Icky glow fuel?
If you put a 2 stroke in it and run it on castor based fuel, yup I'd agree you'd end up with one incredibly gooey airplane, but stick a 4 stroke in it and run it on that mean green stuff and there's hardly any goo at all.

Put me on the "I want one" list, the sound of a Saito was just made for something like this... if only I could figure out the RAF squadron it belongs to.....