Over the years I've had a couple of Goldbrerg Cubs. Both had OS 70's in them. Loved em,but with your engine selection, I'd recommend the bigGreat Planes Cub. I've flown one wiyh a OS 120 twin in it, and it was GREAT! The Sig quarter scale Cub flies in a scale manor with the 120. The Great Planes is my favorite, tho.