Started building my Living Tombstone inspired by Paul Kreutz. Taking a bit of a different approach. Stone is 1-1/2" pink styro with 1/4" luan ply backing. I'm using a 1/4" rod end to attach the mannequin face to the stone's backing. A 10" round piece of luan will get glued to the back of mannequin face for the motor arm to ride on. There won't be any springs on it, the rod end will allow movement in all directions. Some of this is theory at this point, not 100% sure it's gonna work yet! Here's what I have so far.