Dennis,
Do you know the figure for the right compression ratio for this pixy after getting about .018 to .021 clearance?
I may have someone here that have the compression gauge that i can measure it and compare with your figure.
I've sanded about 0.007 off the top liner, and putting the 0.004 shim in there. From your calculation, i believe i should have about 0.021 clearance now. I'm going to try and run it with McCoy MC-8 and 30% Rocket Science Fuels this weekend and see how it goes.
Nizam.