No problem-- In that case I would choose to use the RCS or MVVS gas engines as they are both beam mounted and I do think you may be able to conceal most of the engine and muffler. They may cost $150-$200 more than the Zenoah, but they are a bit lighter too. If you can't do that, what I did is ordered a fiberglass cowl for a Super Cub and it will cover most if not all of it. (Yea, I know it robs the scale looks, but then having a chain saw engine sticking out the side sorta does the same)