Na, let's put a DA 50 in it............... Oh wait a minute, this is a 60 size, oops, I'm thinkin of a different plane. Sure, a Saito .100 will work. It might be best to go inverted with it. Even with a two stroke with Pitts muffler, quite a bit of the cowl on the bottom front is hawged out but it still is not bad and actually, looks good. I chose a two stroker for RPM speed. You will certainly need a much bigger tank though for that .100 and of course the appropriate prop too. Back to the engine choice again, I dont know if you will like the head sticking out the bottom as it will, I dont think you can fit it in the cowl sideways. A mistake on it will cost you $30 bucks for a new cowl, so be careful the first time. I can't post photos because of the proxy server here at my work computor and I dont have internet t home yet. But if you can , please do so. Finnished wing last night. All hinge slots are too shallow and need to be hawged out more. Other than that, onto the tail feathers. Seeya, MM