My RXP has been apart since last fall when my Riva driveshaft extension twisted, Riva was 1st class all the way and sent me all new parts that were damaged but I have have had too many other things going on since then to mess with it! Hope to get it back together and run it this weekend though, I just bought the Skat 14/19r that Jerry tweaked for Sundance's old RXP, it ran 82-83 on that setup, my best so far was 81.3 with a stock Solas 15/20r.