Yea, I agree the haz mat on fuel included would make the idea less atractive. But having an engine installed, Or included, that will balance the airplane would be a good thing for a beginner kit builder.
Of course, this is your project, but I see me buying these for my nephews after they fly thier Cox plastic planes and are wanting to move up.
I tried to balance everything on a plane I built, before it was built, it didnt work out, and it wasted lots of my time. I have enough of everything, except money and time. and I can do without money, well, no, I cant, but I wish I had more time.
I'm babbleing, time for bed, midnight shift can get in the way sometimes.
Greg