I started this thread, so I might as well jump back in. Consider the Syssa 180 gassie. It is the only offering ( I know there are others) that has what serious 2M pattern guys are looking for. Low weight, compact design, easy start/ maintenance, ability to swing pattern props @ the RPMs /torque required, etc., etc.

No , I don't own one as of yet , but my initial recommendation for this engine has been brought to fruition by Matt K. and Ed A. after a great deal of testing. Read what they and others have said about it. I've have witnessed flight results and handling characteristics and I dare say, this engine is it !

Forget the Saitos, unless you want low level sport performance with all the other negatives.