I have one with an MVVS 40 and tuned muffler. Did it as a taildragger and added wheel pants. Flies rock solid. A wonderful plane, you'll love it. BTW the MVVS is way overkill. A good 45 would work just fine. I had th MVVS and used it. BTW chuck the pushrods in the kit. They suck. I used well supported Sullivan's. Good luck with your build.

Mark Shuman