Well, I have one ‘Block’ BP, and it makes a bunch of instances, which it looks like you are doing, what you need to do is cast to your CubeSpawn BP, with ‘hit actor’ as your target, and then remove instance using the return value of the cast. I suggest you do all the line tracing and stuff like that in your Character BP. I have all my mining & placing in character, but I also have NEARLY ALL of my variables in my gamemode BP so that I can access them from anywhere.