Pete,

I'm going with the factory muffler.i'm not satisfied with the pitts..i'm sure it would be fine but,the muffler yall designed seems so much better..all ive got to do is notch a small spot on fusalage corner where the very end of the muffler won't hit on bottom side of firewall..cowl will cover it up anyway..just put a liitle angle notch and glue it back..about half way done with getting it together.hopefully maiden flight when weather permits probably week or so...

Craig....