The 3mm 53 turns slighly less RPM that the average 50 but it has a little more torque. I would not use anything larger than a 23" prop, and the Evolution prolly isn't the best cut for the engine. So a 23-8 in another brand if you are looking for peak rpm. A 22-8 would probably be better still. I'll suggest a laminated wood Xoar as a good start.