It seems like more and more models of the Evolution engine are showing up in the ads these days with sizes ranging from 40 on up, maybe even to a 61. It looked to me like one of the smaller ones was a bushing engine and cheaper priced, while the NT series were ball bearing engines.

More than likely the 3 bladed prop will give beginners a bit more ground clearance. The engine should spool up quicker without the flywheel but not idle quite as slowly. A 2 bladed APC will add some weight without needing the flywheel.... maybe a good compromise.

Ernie