A heads up on these shocks, (at least mine)the aluminum end caps are secured by very small set screws (size .050 allen) and are loc-tited in from the factory and a good over night soak with Kroil or other penetrating solvent is a good idea before attempting to put any torque to them, I set the shocks to the 2nd setting to start, as the higher settings retreat away from the bottom cap as more preload is applied, I found that by inserting a 9/16ths 6" bolt in the eye of the shock, I was able to precisely square up the caps to the bore lines of the shocks with my 4" machinist square.
Also I needed to spin the top retainer ring via a brass drift and hammer so that I could utilize both set screws at the top, it moved quite easily, one more btw, the bottom of the shock is offset from the centerline and I had to call the tech guy at Progressive to verify that the offset goes inboard towards the bike..so it all installed pretty smooth except for breaking the set screws loose and breaking my only .050 allen wrench I had on my first attempt to move them. LOL
