RE: Sig Kobra(25size) w/32sx
Yeah, those are good choices. I only put down 9-5 because if I had all three on hand I'd check them all just to observe the differences and what they had to offer in terms of performance. I bet the 9-6 is perfect for test flights and decent sport performance; the 9-5 is probably thin on pitch to be of use in that aircraft.
I never did get my own OS .32 when they were on the shelf, but I've messed with them. Nice engine indeed. I want one for a Screamin Demon.
MJD