diff --git a/Assets/Scripts/ByteUtils.cs b/Assets/Scripts/ByteUtils.cs
index 7f16099..c648d82 100644
--- a/Assets/Scripts/ByteUtils.cs
+++ b/Assets/Scripts/ByteUtils.cs
@@ -5,139 +5,139 @@ namespace Marro.PacManUdon
 {
     public static class ByteUtils
     {
-        private static void Append(byte[] value, byte[] target, ref int index)
+        public static void Append(this byte[] target, byte[] value, ref int index)
         {
             Debug.Log($"ByteUtils Append value.Length: {value.Length}, array.Length : {target.Length}, index: {index}");
             Array.Copy(value, 0, target, index, value.Length);
             index += value.Length;
         }
 
-        public static void Append(byte value, byte[] target, ref int index) =>
+        public static void Append(this byte[] target, byte value, ref int index) =>
             target[index++] = value;
 
-        public static void Append(sbyte value, byte[] target, ref int index) =>
+        public static void Append(this byte[] target, sbyte  value, ref int index) =>
             target[index++] = (byte)value;
 
-        public static void Append(bool value, byte[] target, ref int index) =>
+        public static void Append(this byte[] target, bool value, ref int index) =>
             target[index++] = value ? (byte)1 : (byte)1;
 
-        public static void Append(ushort value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, ushort value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(short value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, short value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(uint value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, uint value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(int value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, int value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(ulong value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, ulong value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(long value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, long value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(float value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, float value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(double value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, double value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(char value, byte[] target, ref int index) =>
-            Append(BitConverter.GetBytes(value), target, ref index);
+        public static void Append(this byte[] target, char value, ref int index) =>
+            target.Append(BitConverter.GetBytes(value), ref index);
 
-        public static void Append(Vector2 value, byte[] target, ref int index)
+        public static void Append(this byte[] target, Vector2 value, ref int index)
         {
-            Append(value.x, target, ref index);
-            Append(value.y, target, ref index);
+            target.Append(target, ref index);
+            target.Append(value.y, ref index);
         }
 
-        public static void Append(Vector3 value, byte[] target, ref int index)
+        public static void Append(this byte[] target, Vector3 value, ref int index)
         {
-            Append(value.x, target, ref index);
-            Append(value.y, target, ref index);
-            Append(value.z, target, ref index);
+            target.Append(value.x, ref index);
+            target.Append(value.y, ref index);
+            target.Append(value.z, ref index);
         }
 
-        public static byte ReadByte(byte[] source, ref int index) =>
+        public static byte ReadByte(this byte[] source, ref int index) =>
             source[index++];
 
-        public static bool ReadBool(byte[] source, ref int index) =>
+        public static bool ReadBool(this byte[] source, ref int index) =>
             source[index++] > 0;
 
-        public static ushort ReadUShort(byte[] source, ref int index)
+        public static ushort ReadUShort(this byte[] source, ref int index)
         {
             var value = BitConverter.ToUInt16(source, index);
             index += 2;
             return value;
         }
 
-        public static short ReadShort(byte[] source, ref int index)
+        public static short ReadShort(this byte[] source, ref int index)
         {
             var value = BitConverter.ToInt16(source, (int)index);
             index += 2;
             return value;
         }
 
-        public static uint ReadUInt(byte[] source, ref int index)
+        public static uint ReadUInt(this byte[] source, ref int index)
         {
             var value = BitConverter.ToUInt32(source, index);
             index += 4;
             return value;
         }
 
-        public static int ReadInt(byte[] source, ref int index)
+        public static int ReadInt(this byte[] source, ref int index)
         {
             var value = BitConverter.ToInt32(source, index);
             index += 4;
             return value;
         }
 
-        public static ulong ReadULong(byte[] source, ref int index)
+        public static ulong ReadULong(this byte[] source, ref int index)
         {
             var value = BitConverter.ToUInt64(source, index);
             index += 8;
             return value;
         }
 
-        public static long ReadLong(byte[] source, ref int index)
+        public static long ReadLong(this byte[] source, ref int index)
         {
             var value = BitConverter.ToInt64(source, index);
             index += 8;
             return value;
         }
 
-        public static float ReadFloat(byte[] source, ref int index)
+        public static float ReadFloat(this byte[] source, ref int index)
         {
             var value = BitConverter.ToSingle(source, index);
             index += 4;
             return value;
         }
 
-        public static double ReadDouble(byte[] source, ref int index)
+        public static double ReadDouble(this byte[] source, ref int index)
         {
             var value = BitConverter.ToDouble(source, index);
             index += 8;
             return value;
         }
 
-        public static char ReadChar(byte[] source, ref int index)
+        public static char ReadChar(this byte[] source, ref int index)
         {
             var value = BitConverter.ToChar(source, index);
             index += 2;
             return value;
         }
 
-        public static Vector2 ReadVector2(byte[] source, ref int index)
+        public static Vector2 ReadVector2(this byte[] source, ref int index)
         {
             var value = new Vector2(BitConverter.ToSingle(source, index), BitConverter.ToSingle(source, index + 4));
             index += 8;
             return value;
         }
 
-        public static Vector3 ReadVector3(byte[] source, ref int index)
+        public static Vector3 ReadVector3(this byte[] source, ref int index)
         {
             var value = new Vector3(BitConverter.ToSingle(source, index), BitConverter.ToSingle(source, index + 4), BitConverter.ToSingle(source, index + 8));
             index += 12;
diff --git a/Assets/Scripts/GridMover.cs b/Assets/Scripts/GridMover.cs
index da2611a..08402fb 100644
--- a/Assets/Scripts/GridMover.cs
+++ b/Assets/Scripts/GridMover.cs
@@ -37,8 +37,8 @@ namespace Marro.PacManUdon
                 return;
             }
 
-            ByteUtils.Append(GetPosition(), data, ref index);
-            ByteUtils.Append(GetDirection(), data, ref index);
+            data.Append(GetPosition(), ref index);
+            data.Append(GetDirection(), ref index);
         }
 
         public override bool WriteSyncedData(byte[] data, ref int index, NetworkEventType eventType)
@@ -48,8 +48,8 @@ namespace Marro.PacManUdon
                 return true;
             }
 
-            SetPosition(ByteUtils.ReadVector2(data, ref index));
-            SetDirection(ByteUtils.ReadVector2(data, ref index));
+            SetPosition(data.ReadVector2(ref index));
+            SetDirection(data.ReadVector2(ref index));
 
             return true;
         }
diff --git a/Assets/Scripts/PacMan.cs b/Assets/Scripts/PacMan.cs
index 09331f0..0a962b0 100644
--- a/Assets/Scripts/PacMan.cs
+++ b/Assets/Scripts/PacMan.cs
@@ -343,7 +343,7 @@ namespace Marro.PacManUdon
                 return;
             }
 
-            ByteUtils.Append(targetDirection, data, ref index);
+            data.Append(targetDirection, ref index);
 
             base.CollectSyncedData(data, ref index, eventType);
         }
@@ -355,7 +355,7 @@ namespace Marro.PacManUdon
                 return true;
             }
 
-            SetTargetDirection(ByteUtils.ReadVector2(data, ref index));
+            SetTargetDirection(data.ReadVector2(ref index));
 
             return base.WriteSyncedData(data, ref index, eventType);
         }
diff --git a/Assets/Test stuff/TestBall.cs b/Assets/Test stuff/TestBall.cs
index c0bbdea..c3b80f1 100644
--- a/Assets/Test stuff/TestBall.cs	
+++ b/Assets/Test stuff/TestBall.cs	
@@ -134,8 +134,8 @@ public class TestBall : SyncedObject
             || eventType == NetworkEventType.FullSyncForced)
         {
             Debug.Log($"({nameof(TestBall)}) Sending sync data at progress {GetProgress()} and amountUp {amountUp}.");
-            ByteUtils.Append(amountUp, data, ref index);
-            ByteUtils.Append(GetProgress(), data, ref index);
+            data.Append(amountUp, ref index);
+            data.Append(GetProgress(), ref index);
         }
     }
 
@@ -144,8 +144,8 @@ public class TestBall : SyncedObject
         if (eventType == NetworkEventType.FullSync
             || eventType == NetworkEventType.FullSyncForced)
         {
-            amountUp = ByteUtils.ReadFloat(data, ref index);
-            SetProgress(ByteUtils.ReadFloat(data, ref index));
+            amountUp = data.ReadFloat(ref index);
+            SetProgress(data.ReadFloat(ref index));
             //Debug.Log($"({nameof(TestBall)}) Received sync event, synced to progress {GetProgress()} and amountUp {amountUp}.");
         }
         else