I have an OS 120 Surpass IIIP sitting around. I might as well pull the Saito 100 and put the OS 120 in. With the Saito 100, it could not do waterfall well enough, even with flaperon coupled. Inverted flat spin can climb, but I cannot keep it flat while climbing, thus ended up tumbling. I got to do some knife edge spin one day, but couldn't do it another day.

Frankly, the OS 120 is only like 300 rpm stronger than the Saito 100. I don't think the OS 120 will do that much better, especially it's like 10 oz heavier.

Maybe Saito 180 or YS 140 is a good match.

Anyway, KrazyC, let us know how it flies with the 120. Maybe I will go for the swap.