Welcome to the new and improved Proflex / K2 Tech Forum!
thing with the swinger air 4 way is you can completely tune out any bottom out thanks to the adjustable spv, you can run it as plush as you like but with no chance of bottom out, imo its one of the best shocks out there, colin yours is being posted tomorow!
37.2mm? oh crap. I measured mine at 36mm and made the bush set 35.75mm wide (normal tolerance). however, my bike is a x500c (not sure if it is a 4 or a 5) and may be different to the later Oz frame. instead of using two halves - I went for the single unit with a left hand side cap. Although, to be fair Colin's picture above shows a left and right bush set that would be a hell of a lot cheaper to make and also that's the arrangement on my Orange 5.have made mental note that the carbon framed bikes are probably all different widths.
I've got 5 sets of bolts from my machine shop back for test in case anyone is interested. Will post pictures later on when I've tried them out. Is there a demand for kits to replace the old nr and smart shocks on carbon frames? The shocks seem to be wearing well. callumrds