I ended up getting his model to work. He had the Y translate axis inverted and some of the tweakable values were off. The only other thing is in the VAB, the part acts weird when you translate it (i.e. both meshes move diagonally instead of the fork piece moving up and down) Haven't tested any of his other pieces yet, seeing as the forklift part was the whole reason i wanted this mod. I did find out the reason the part didn't want to move. Not sure if this is known in the community, but IR associated pieces don't like being the root node of a build. They lock in place when launched.