Any thoughts about how much engine to use? I normally like to wait and let others go first and then benefit from their input here, but since I've already put this on order I'm contemplating which engine to use. I have two OS four-strokes, FS-91II, and an FS-120III (Pump) that I can try. Was also contemplating an RCV-120 for the first time just so I could swing the bigger 3-blade prop.

Slimline makes a nice inverted pitts for both the OS engines that should keep the cowl cutting to a minimum. My current plan is to try each on for a fit (My Local HS will Loan me the RCV) and go from there. I'm no aerobatics wiz, I just enjoy leasurely flying, but I generally go with the upper end of the recommended engine range. I noted at the end of the manual on the P-6 that they said that all of their prototypes used OS FS-120's, though on the video and other docs they refer to the FS-91II.

Guess I'll just have to wait and see!

Steve