Since I'm going to be ordering a new impeller fom Jerry, I might as well get the one I have been putting off from Jerry, for the RXPX, Now I cant remember do I want a 15/22 or 15/20? My Mods are ggoing to be a through hull exhaust, 4" Kana, Rive grate, soon to change. I'm also going to put on my RXP nozzle.