I spent the last two or three years heavily revising my system and now this is year I finally don't have much urge for further revisions. I spent enough time on this site and didn't cheap out on my saddle stuff so I'm pretty ready to rock on that. The single best revision I made over the last couple years was removing cotton from my vocabulary. I probably sound like a broken record at this point, but switching to a wool -> fleece -> windproof outter layering system has probably been the single most effective revision I've made (aside from switching to a saddle).