A few things to note: -as you said, PCV gives the most flexibility, but is a pain to install -I do have K and N filters, and a staintune slip on only. PCV seems to have smoothed out the bike, and feels like it has more shove -DO NOT waste your time with Hilltop ECUs. Utter muppets. The people I dealt with (desk/email staff) couldn't get me actual numbers, a map after the tune, price etc.. The local guy in Vancouver had no help from the mother ship (basically a franchise deal of sorts, with all the add costs, but zero support) -I went down one tooth on the front...didn't really like it. Speedo and odo error went up considerably. Yes it was snappier, but rev'd too high on the hwy, and didn't bring me the benefits I thought it would. Glad the upmap is working as you have hoped.