if you put 2 or 3 washers between the wood ring and the fuse, you will have all the air you need and still have it stay on if you use allens and blind nuts. Just make sure you epoxy the ring in nice and solid. Like I said we have 2 and it does work, also make sure the servo has the wheels in a solid lock when they are down, we had one that unlocked on us and readjusted the push rod and no more problem