click to place. press 1, 2, or 3 for the different blocks
One possible issue I can forsee is that you'll need to increase the number of raycasts performed if we want to add body parts of a really large/really small size. I left in a really large piece so that this issue can be properly demonstrated. If you switch to it, you'll notice that sometimes you can't place it on top of the crate. Look inside the project and go to the backdrop #2 for an explanation.