It works! It places a pink axle

GCMC/CubePlacerEngine.cs

@@ -26,7 +26,7 @@ namespace GCMC
         }
 
         public IEntitiesDB entitiesDB { get; set; }
-        private readonly BlockEntityFactory _blockEntityFactory; //Injected from PlaceBlockEngine - TODO
+        internal static BlockEntityFactory _blockEntityFactory; //Injected from PlaceBlockEngine
 
         private void ImportWorld(string name)
         {
@@ -34,6 +34,8 @@ namespace GCMC
         }
 
         private void PlaceBlock(ushort block, byte color, uint playerId)
+        {
+            try
             {
                 BuildBlock(block, color).Init(new BlockPlacementInfoStruct()
                 {
@@ -41,9 +43,17 @@ namespace GCMC
                     placedBy = playerId
                 });
             }
+            catch (Exception e)
+            {
+                Console.WriteLine(e);
+                Log.Error(e.Message);
+            }
+        }
 
         private EntityStructInitializer BuildBlock(ushort block, byte color)
         {
+            if (_blockEntityFactory == null)
+                throw new Exception("The factory is null.");
             //RobocraftX.CR.MachineEditing.PlaceBlockEngine
             ScalingEntityStruct scaling = new ScalingEntityStruct {scale = new float3(1, 1, 1)};
             RotationEntityStruct rotation = new RotationEntityStruct {rotation = quaternion.identity};
@@ -99,6 +109,6 @@ namespace GCMC
             return new JobHandle();
         }
 
-        public string name { get; }
+        public string name { get; } = "Cube placer engine";
     }
 }

GCMC/FactoryObtainerPatch.cs

@@ -0,0 +1,31 @@
+using System.Reflection;
+using DataLoader;
+using Harmony;
+using JetBrains.Annotations;
+using RobocraftX.Blocks;
+using RobocraftX.Blocks.GUI;
+using RobocraftX.Common;
+using RobocraftX.CR.MachineEditing;
+using RobocraftX.StateSync;
+using Svelto.ECS;
+using Unity.Entities;
+using UnityEngine;
+
+namespace GCMC
+{
+    [HarmonyPatch]
+    [UsedImplicitly]
+    public class FactoryObtainerPatch
+    {
+        static void Postfix(BlockEntityFactory blockEntityFactory)
+        {
+            CubePlacerEngine._blockEntityFactory = blockEntityFactory;
+            Debug.Log("Block entity factory injected.");
+        }
+
+        static MethodBase TargetMethod(HarmonyInstance instance)
+        {
+            return typeof(PlaceBlockEngine).GetConstructors()[0];
+        }
+    }
+}

GCMC/PlaceBlockPatch.cs

@@ -1,6 +1,7 @@
 using System.Reflection;
 using DataLoader;
 using Harmony;
+using JetBrains.Annotations;
 using RobocraftX.Blocks.GUI;
 using RobocraftX.Common;
 using RobocraftX.CR.MachineEditing;
@@ -12,6 +13,7 @@ using UnityEngine;
 namespace GCMC
 {
     [HarmonyPatch]
+    [UsedImplicitly]
     public class PlaceBlockPatch
     {
         static void Postfix(EnginesRoot enginesRoot, ref StateSyncRegistrationHelper stateSyncReg, bool isAuthoritative)