I mounted a Saito .72 on my Twist and used the engine mount provided, no problems. I put a slight amount of right thrust into my model by measuring the distance between the prop tip and the wing leading edge. The right tip is 2mm closer to the leading edge than the left tip. Actually I measure to the same blade tip, just rotate the prop. Models like these can usually handle, if not actually need, a small amount of right thrust; perhaps two degrees if measured with an incidence meter. I don't think that any single-engine airplane needs left thrust; assuming the plane was constructed properly. 2mm is not much, but it ensures no left thrust. Plan was to add washers behind the left engine mount if the model needed more right thrust. I have since flown the model many times and I don't perceive that any thrust change is necessary. I recall reading in another thread that some modelers were having trouble connecting the throttle control rod to the Saito .72; someone even recommended cutting the cowl cheeks off! Not necessary, just use a shortened ball link and brass connector. I cut about 1\4 inch off a small brass ball link connector, soldered the connector to a piece of music wire, bent the wire back 180 degrees, cut about 1\8 inch off the ball link, bent the wire and connector to get the proper angle, and it all works fine. Lots of words, easily seen in my mind because I made it, but probably not yours. I will end this post and attempt to post a picture; havn't done that before. However; before I leave, the Saito .72 turns an APC 14 x 4W at 10,100 on Wildcat 10%. Performance on the Twist is awesome. BTW, purpose for shortening the ball link\connector was to keep the connector from hitting the engine.