diff --git a/build.gradle b/build.gradle
index ac45dd65c..5671c4535 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ buildscript {
         maven { url = 'https://maven.parchmentmc.org' }
     }
     dependencies {
-        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: "${forgegradle_version}", changing: false
+        classpath "net.minecraftforge.gradle:ForgeGradle:${forgegradle_version}"
         classpath "org.spongepowered:mixingradle:${mixingradle_version}"
         classpath "org.parchmentmc:librarian:${librarian_version}"
     }
@@ -37,9 +37,15 @@ version = mod_version + (dev && buildNumber != null ? "-${buildNumber}" : '')
 
 java.toolchain.languageVersion = JavaLanguageVersion.of(17)
 
-println('Java: ' + System.getProperty('java.version') + ' JVM: ' + System.getProperty('java.vm.version') + '(' + System.getProperty('java.vendor') + ') Arch: ' + System.getProperty('os.arch'))
+println('Java: ' + System.getProperty('java.version') + ' JVM: ' + System.getProperty('java.vm.version') + ' (' + System.getProperty('java.vendor') + ') Arch: ' + System.getProperty('os.arch'))
+
 minecraft {
-    mappings channel: 'parchment', version: "${parchment_version}-${minecraft_version}"
+    if (Boolean.parseBoolean(project.use_parchment)) {
+        mappings channel: 'parchment', version: "${parchment_version}-${minecraft_version}"
+    } else {
+        mappings channel: 'official', version: "${minecraft_version}"
+    }
+
     accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
 
     runs {
@@ -165,7 +171,7 @@ dependencies {
         jarJar.ranged(it, '[MC1.18.2-1.1.3,)')
     }
     jarJar("com.jozufozu.flywheel:flywheel-forge-${flywheel_minecraft_version}:${flywheel_version}") {
-        jarJar.ranged(it, '[0.6.8,0.6.9)')
+        jarJar.ranged(it, '[0.6.9,0.6.10)')
     }
 
     implementation fg.deobf("com.tterrag.registrate:Registrate:${registrate_version}")
@@ -199,7 +205,7 @@ dependencies {
     // https://discord.com/channels/313125603924639766/725850371834118214/910619168821354497
     // Prevent Mixin annotation processor from getting into IntelliJ's annotation processor settings
     // This allows 'Settings > Build, Execution, and Deployment > Build Tools > Gradle > Build and run using' set to IntelliJ to work correctly
-    if (System.getProperty('idea.sync.active') != 'true') {
+    if (!Boolean.getBoolean('idea.sync.active')) {
         annotationProcessor "org.spongepowered:mixin:${mixin_version}:processor"
     }
 }
diff --git a/gradle.properties b/gradle.properties
index 96fed69b3..4fbade479 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@ org.gradle.jvmargs = -Xmx3G
 org.gradle.daemon = false
 
 # mod version info
-mod_version = 0.5.1.b
+mod_version = 0.5.1.c
 artifact_minecraft_version = 1.18.2
 
 minecraft_version = 1.18.2
@@ -18,10 +18,12 @@ librarian_version = 1.+
 cursegradle_version = 1.4.0
 parchment_version = 2022.11.06
 
+use_parchment = true
+
 # dependency versions
 registrate_version = MC1.18.2-1.1.3
 flywheel_minecraft_version = 1.18.2
-flywheel_version = 0.6.8.a-99
+flywheel_version = 0.6.9-100
 jei_minecraft_version = 1.18.2
 jei_version = 9.7.0.209
 curios_minecraft_version = 1.18.2
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 41d9927a4..943f0cbfa 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index aa991fcea..508322917 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 1b6c78733..65dcd68d6 100755
--- a/gradlew
+++ b/gradlew
@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,10 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -143,12 +143,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -205,6 +209,12 @@ set -- \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.
diff --git a/gradlew.bat b/gradlew.bat
index 107acd32c..93e3f59f1 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -14,7 +14,7 @@
 @rem limitations under the License.
 @rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +25,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,7 +41,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -75,13 +76,15 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal
diff --git a/src/main/java/com/simibubi/create/Create.java b/src/main/java/com/simibubi/create/Create.java
index 7a26283fd..7dcb3da68 100644
--- a/src/main/java/com/simibubi/create/Create.java
+++ b/src/main/java/com/simibubi/create/Create.java
@@ -69,7 +69,7 @@ public class Create {
 
 	public static final String ID = "create";
 	public static final String NAME = "Create";
-	public static final String VERSION = "0.5.1b";
+	public static final String VERSION = "0.5.1c";
 
 	public static final Logger LOGGER = LogUtils.getLogger();
 
diff --git a/src/main/java/com/simibubi/create/compat/computercraft/implementation/ComputerBehaviour.java b/src/main/java/com/simibubi/create/compat/computercraft/implementation/ComputerBehaviour.java
index 769de33ae..e33cc4a9d 100644
--- a/src/main/java/com/simibubi/create/compat/computercraft/implementation/ComputerBehaviour.java
+++ b/src/main/java/com/simibubi/create/compat/computercraft/implementation/ComputerBehaviour.java
@@ -35,21 +35,21 @@ public class ComputerBehaviour extends AbstractComputerBehaviour {
 		this.peripheralSupplier = getPeripheralFor(te);
 	}
 
-	public static NonNullSupplier<IPeripheral> getPeripheralFor(SmartBlockEntity te) {
-		if (te instanceof SpeedControllerBlockEntity scbe)
+	public static NonNullSupplier<IPeripheral> getPeripheralFor(SmartBlockEntity be) {
+		if (be instanceof SpeedControllerBlockEntity scbe)
 			return () -> new SpeedControllerPeripheral(scbe, scbe.targetSpeed);
-		if (te instanceof DisplayLinkBlockEntity dlbe)
+		if (be instanceof DisplayLinkBlockEntity dlbe)
 			return () -> new DisplayLinkPeripheral(dlbe);
-		if (te instanceof SequencedGearshiftBlockEntity sgbe)
+		if (be instanceof SequencedGearshiftBlockEntity sgbe)
 			return () -> new SequencedGearshiftPeripheral(sgbe);
-		if (te instanceof SpeedGaugeBlockEntity sgbe)
+		if (be instanceof SpeedGaugeBlockEntity sgbe)
 			return () -> new SpeedGaugePeripheral(sgbe);
-		if (te instanceof StressGaugeBlockEntity sgbe)
+		if (be instanceof StressGaugeBlockEntity sgbe)
 			return () -> new StressGaugePeripheral(sgbe);
-		if (te instanceof StationBlockEntity sbe)
+		if (be instanceof StationBlockEntity sbe)
 			return () -> new StationPeripheral(sbe);
 
-		throw new IllegalArgumentException("No peripheral available for " + te.getType()
+		throw new IllegalArgumentException("No peripheral available for " + be.getType()
 			.getRegistryName());
 	}
 
diff --git a/src/main/java/com/simibubi/create/content/equipment/armor/DivingBootsItem.java b/src/main/java/com/simibubi/create/content/equipment/armor/DivingBootsItem.java
index 3d62f6765..97f535c67 100644
--- a/src/main/java/com/simibubi/create/content/equipment/armor/DivingBootsItem.java
+++ b/src/main/java/com/simibubi/create/content/equipment/armor/DivingBootsItem.java
@@ -1,7 +1,5 @@
 package com.simibubi.create.content.equipment.armor;
 
-import org.jetbrains.annotations.Nullable;
-
 import com.simibubi.create.foundation.utility.NBTHelper;
 
 import net.minecraft.resources.ResourceLocation;
@@ -27,19 +25,18 @@ public class DivingBootsItem extends BaseArmorItem {
 	}
 
 	public static boolean isWornBy(Entity entity) {
-		ItemStack stack = getWornItem(entity);
-		if (stack == null) {
-			return false;
-		}
-		return stack.getItem() instanceof DivingBootsItem;
+		return !getWornItem(entity).isEmpty();
 	}
 
-	@Nullable
 	public static ItemStack getWornItem(Entity entity) {
 		if (!(entity instanceof LivingEntity livingEntity)) {
-			return null;
+			return ItemStack.EMPTY;
 		}
-		return livingEntity.getItemBySlot(SLOT);
+		ItemStack stack = livingEntity.getItemBySlot(SLOT);
+		if (!(stack.getItem() instanceof DivingBootsItem)) {
+			return ItemStack.EMPTY;
+		}
+		return stack;
 	}
 
 	@SubscribeEvent
diff --git a/src/main/java/com/simibubi/create/content/equipment/armor/DivingHelmetItem.java b/src/main/java/com/simibubi/create/content/equipment/armor/DivingHelmetItem.java
index 3f8f6e1c0..f51c0ec18 100644
--- a/src/main/java/com/simibubi/create/content/equipment/armor/DivingHelmetItem.java
+++ b/src/main/java/com/simibubi/create/content/equipment/armor/DivingHelmetItem.java
@@ -1,7 +1,5 @@
 package com.simibubi.create.content.equipment.armor;
 
-import org.jetbrains.annotations.Nullable;
-
 import com.simibubi.create.foundation.advancement.AllAdvancements;
 
 import net.minecraft.resources.ResourceLocation;
@@ -38,22 +36,19 @@ public class DivingHelmetItem extends BaseArmorItem {
 		return super.canApplyAtEnchantingTable(stack, enchantment);
 	}
 
-	public static boolean isWornBy(Entity entity, boolean fireproof) {
-		ItemStack stack = getWornItem(entity);
-		if (stack == null)
-			return false;
-		if (!stack.getItem()
-			.isFireResistant() && fireproof)
-			return false;
-		return stack.getItem() instanceof DivingHelmetItem;
+	public static boolean isWornBy(Entity entity) {
+		return !getWornItem(entity).isEmpty();
 	}
 
-	@Nullable
 	public static ItemStack getWornItem(Entity entity) {
 		if (!(entity instanceof LivingEntity livingEntity)) {
-			return null;
+			return ItemStack.EMPTY;
 		}
-		return livingEntity.getItemBySlot(SLOT);
+		ItemStack stack = livingEntity.getItemBySlot(SLOT);
+		if (!(stack.getItem() instanceof DivingHelmetItem)) {
+			return ItemStack.EMPTY;
+		}
+		return stack;
 	}
 
 	@SubscribeEvent
@@ -67,8 +62,13 @@ public class DivingHelmetItem extends BaseArmorItem {
 			entity.getPersistentData()
 				.remove("VisualBacktankAir");
 
+		ItemStack helmet = getWornItem(entity);
+		if (helmet.isEmpty())
+			return;
+
 		boolean lavaDiving = entity.isInLava();
-		if (!isWornBy(entity, lavaDiving))
+		if (!helmet.getItem()
+			.isFireResistant() && lavaDiving)
 			return;
 		if (!entity.isEyeInFluid(FluidTags.WATER) && !lavaDiving)
 			return;
diff --git a/src/main/java/com/simibubi/create/foundation/events/ClientEvents.java b/src/main/java/com/simibubi/create/foundation/events/ClientEvents.java
index 807325ce8..a7bbd6ac1 100644
--- a/src/main/java/com/simibubi/create/foundation/events/ClientEvents.java
+++ b/src/main/java/com/simibubi/create/foundation/events/ClientEvents.java
@@ -311,7 +311,7 @@ public class ClientEvents {
 			return;
 
 		ItemStack divingHelmet = DivingHelmetItem.getWornItem(entity);
-		if (divingHelmet != null) {
+		if (!divingHelmet.isEmpty()) {
 			if (FluidHelper.isWater(fluid)) {
 				event.scaleFarPlaneDistance(6.25f);
 				event.setCanceled(true);
diff --git a/src/main/java/com/simibubi/create/foundation/mixin/LavaSwimmingMixin.java b/src/main/java/com/simibubi/create/foundation/mixin/LavaSwimmingMixin.java
index 6156c68b8..b09cb7273 100644
--- a/src/main/java/com/simibubi/create/foundation/mixin/LavaSwimmingMixin.java
+++ b/src/main/java/com/simibubi/create/foundation/mixin/LavaSwimmingMixin.java
@@ -26,7 +26,7 @@ public abstract class LavaSwimmingMixin extends Entity {
 	@Inject(method = "travel(Lnet/minecraft/world/phys/Vec3;)V", slice = @Slice(from = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/LivingEntity;isInLava()Z")), at = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/LivingEntity;move(Lnet/minecraft/world/entity/MoverType;Lnet/minecraft/world/phys/Vec3;)V", shift = Shift.AFTER, ordinal = 0))
 	private void create$onLavaTravel(Vec3 travelVector, CallbackInfo ci) {
 		ItemStack bootsStack = DivingBootsItem.getWornItem(this);
-		if (bootsStack != null && AllItems.NETHERITE_DIVING_BOOTS.isIn(bootsStack))
+		if (AllItems.NETHERITE_DIVING_BOOTS.isIn(bootsStack))
 			setDeltaMovement(getDeltaMovement().multiply(DivingBootsItem.getMovementMultiplier((LivingEntity) (Object) this)));
 	}
 }
diff --git a/src/main/resources/META-INF/accesstransformer.cfg b/src/main/resources/META-INF/accesstransformer.cfg
index 80e9c4ffb..a911f646d 100644
--- a/src/main/resources/META-INF/accesstransformer.cfg
+++ b/src/main/resources/META-INF/accesstransformer.cfg
@@ -41,4 +41,4 @@ public net.minecraft.client.model.AgeableListModel f_102011_ # babyBodyScale
 public net.minecraft.client.model.AgeableListModel f_102012_ # bodyYOffset
 
 public net.minecraft.client.gui.components.CommandSuggestions f_93866_ # suggestions
-public net.minecraft.client.gui.components.CommandSuggestions$SuggestionsList <init>(Lnet/minecraft/client/gui/components/CommandSuggestions;IIILjava/util/List;Z)V # <init>
\ No newline at end of file
+public net.minecraft.client.gui.components.CommandSuggestions$SuggestionsList <init>(Lnet/minecraft/client/gui/components/CommandSuggestions;IIILjava/util/List;Z)V # <init>
diff --git a/src/main/resources/META-INF/mods.toml b/src/main/resources/META-INF/mods.toml
index d920a5943..0cb21ffad 100644
--- a/src/main/resources/META-INF/mods.toml
+++ b/src/main/resources/META-INF/mods.toml
@@ -33,6 +33,6 @@ Technology that empowers the player.'''
 [[dependencies.create]]
     modId="flywheel"
     mandatory=true
-    versionRange="[0.6.8,0.6.9)"
+    versionRange="[0.6.9,0.6.10)"
     ordering="AFTER"
     side="CLIENT"