I dunno.......I built mine last year and still flies well with a Saito FA-56 with an APC 12X6. Balances ok at the recommended CG. It's only squirrely on the ground for take off....but once she becomes airbourne... she's one sweet flier. Very aerobatic and nice to look at. In the beginning....on landing she would cartwheel. No broken bones. I do have the landings nailed down now though...but every now and then it would still cartwheel....guess it's when the grass is cut or not etc or just my landing skills.
Hey....if you can fly this Pitts....U can fly anything...
Good luck and cheers.