1st - Gregolot - what you say is true, but in this day of mass information exchange, a buyer SHOULDN'T be unawares. Yes, I have the non-graphite piston. Yes, MVVS in the US won't touch it. SO? Why would I ASK them ?

2nd - Performance is coming in now, I'm on my 3rd tank (nearly 2 + hours of run time! 14 oz tanks!), have leaned the top end a bit...Bolly 16.5 x 12 standard...today was SOLID 7850...that is a BUNCH on a K&S muffler ! The Bolly is about equiv load to an APC 17 x 12...