I think you missed my point. The differences between a state of the art pattern ship and an IMAC scale plane are the key. In a capable hand of a skilled pilot, the pattern plane will fly better and hit higher scores.

I have been flying several 50 to 80cc Extras practicing IMAC. By no mean Extra will roll as slick as a Passport. In my opinion, thr YAKs probably can be flown more like pattern planes.