I have the Sig Clipped version and fly it with the Saito 1.8. Great combo. I have been told that I usually put a Corvette engine in my planes,, but I think the 1.8 is a great combo and it is small enough to fit the cowl. (if you put it inverted only a small part will extend. ) I side mounted and let the cyl ext with scale cyl on the other side. Jim