Tony - Most of the .21 conversions i have seen ( including my uncle's ) use the Picco .21, in whatever variant they choose ( OFNA, Trinity, Ect ). I've run the OFNA/Picco, and it tuned fine for me, so i don't see any problems there. My uncle just droped it off saying he can't tune it, but i havent run it since he droped it off, so i don't know what the problem is yet.

Modena AL - I agree to a certain point on the discount. It rocks, but it hurts my RC'ing schedule, so it may not last long.