I don't know if anyone has already made one of these but here is a small mod I made for the bolt for the Z end stop. It's just a little foot pad that makes it so you will contact the switch farther out. I just used the bolt itself to tap the plastic. Also I added some teflon tape to the bolt before I reinstalled it because it was a bit wobbly. It's pretty solid now and easy to adjust. Just to clarify, I put Teflon tape around the portion of the bolt that's in the black plastic. It's not needed for the foot pad.