RE: Have evolution .46 for Morris profile
other than the macs pipe i diddn't change anything on the motor. The reason I chose this engine over the os is was mostly cost working and trying to pay for college and planes the low cost won it for me. but i could not be happier with the engine. the bolt pattern is the same as an os. We tried it on a friends at the field and it made a huge differance on his os as well. 11.5x4 or 11x4 are best 3d props I have found for it.
good luck
probro
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