OH, and I had some friends help me with the spacer install, and the DIY called for bungie cords to hold the calipers while you did everything.
Well, we got everything back on and I drove around for a few weeks and every now and then I'd hear a thud in the rear...
Figured I'd check it out, and sure enough, a bungie cord was left up in there on the pass. rear. Luckily it wasn't wrapped around anything and did no noticeable damage.