Tom, I'm not a big fan of any OS engine made past 1990. That being said I had no issues with a .61 FX that I once had. I too was a member of SCCMAS 1997-2014, I can't really recall anyone out there in recent years I would comfortably call an engine expert. I voted for Rossi because not only do they make great power but they are very reliable and easy to operate.