I had (sold it) a 4*60 with an OS fs91. was perfect combination. There is no such thing as too much power. If you can balance the bird, and have prop clearance, then go for it. power helps, if you get in a tight spot. Use the throttle to control the engine. Main thing with big engine on small plane is use throttle and go to low pitch prop.

If it calls for a 60, then a 75 will do real good, and a saito 100 will be just right!

Bruce