I tried top and bottom using the bmw mounts for the spring, on the top i made the spacer so you can bolt it to the body using the holes for the air bag, on the bottom i used a spacer and a peg that fit into the hole for the bottom mount. The only issue i see is if you disconnect everything and try to get the spacer in there, your fighting the spring both up and down force wise, and side to side at that point...or in and out depending at how you look at it. the spring will want to push the hub towards the outside.