RE: OS FSR for C/L?
4u2nv...
The "newer" engines ( to me that is, I'm old...): schneurle porting, ABC or similar metals, were mostly designed for RC use, where they sell the great majority of engines.
As a result, they were designed for higher RPM use, where they produce a lot of useful power if you do it right. Parts of the approach include muffler pressure, flat pitch props, and fuel with considerable synthetic oil in the oil portion.
Examples: Fuels for ABC-schneurle stunt engines are around 10% nitro, 10% castor and 10% synthetic. The synthetic keeps the engines cleaner inside, so the carefully dimensioned ABC fits work well. Castor helps carry away heat.
Props allow a low-2-cycle- setting at somewhere between 9500 and 11000 RPM - a lot higher than the old steel and iron engines liked. Props around 4" pitch allow them to run happily at modest load. Sort of like driving a stick-shift sports car in 2d gear. Lotsa RPM, and you can hold RPM up and down hills and through very sharp cornering without blowing up the engine.
Your 32 is pretty close to that idea...
LUCK! Enjoy and share your results with us?