you're not kidding, these guys really did do some testing...
cant wait to hear how the new engine works out.

I hope that this engine can get into the powerband with the fan, if it does than it will really scream.

This O.S. .15 RX looks like a good engine, except for that weird crankshaft end. I wonder if a crank from another o.s. .15 can fit, and if the crank porting is different. If only it had a pullstart and regular crank....