Just thought I'd give me opinion on the shocks binding.. I've played around a lot with different O-Rings in the process of building mine up, and I came to the conclusion that there is nothing wrong with the kit O-Rings or Shock Shafts for that matter. The issue of the shocks binding is due to the O-Ring and Spacer proportions within the shock body, removing the middle shim between the two O-Ring's isn't an option unless you want to risk the shocks leaking. I simply ended up sanding 0.2mm off of the middle spacer in order to reduce stiction of the O-Rings once the retaining nut is cranked down. This then provides perfectly free action which should potentially be leak free! My shocks certainly feel like butter now, and all you need is about 5 minutes, some fine sand paper on a flat surface and a decent sent of digital calipers
If your worried about sacrificing the kit delrin washers in case you remove too much material, don't forget that you get the molded washers on a plastic molding provided with your kit, I sanded these one's down to keep the original delrin washers unmodified