That saito is a great engine for pulling the Cub. My first Cub was 1/5 scale with an 80" wingspan. I had a Magnum 52 FS on it. I must admit, it was low on power. But it proved one thing to me, you almost can not under power a cub. This coming from a guy who put a YS-61(long) two stroke with tuned pipe on his 40 size Big Stick.

Mike