I agree with GarySS. You only have engines for the 40 size. I think you would be disappointed with the bigger plane with either of those engines. Either would fly the 46 well. I use a Saito 82 on my 46, YS110 on my 60 and OS160 on my Giant.

You'll love any of the UCDs. They are wonderfully flying airplanes. They'll do any stunt and are so easy to fly.

One of the best planes made.

Thanks
Barry