The setup that Pat and I ended up with is the .275 venturi, a ST sized needle valve assembly, Powermaster 10 x 22 fuel ( 50 castor 50% synthetic) The APC 12.25 x 3.75 prop. On my profiles I typically launch around 9600 to 9700. On full fuse ships, around 9800. My profiles lean slightly due to the tank location relative to the needle hence the lower launch rpm.
I run several tanks, a few short runs at a time per tank, smaller prop say a 9 x4 or 10 x 4 right on the rich two stroke range. Fly it slightly rich and the more time you get the sweeter it will come on.
great engine for intermidiate sized airplanes. I have flown one over 600 inchs and it was a tank,, almost emberassed to say it was 54 or 55 oz and it flew effortlessly.
have fun,,