Mr Chinscoop,
I was already thinking about being able to run a Q-500 timed engine with a Q-500 prop like an 8.75 x 9.25 ... but I don't think that would be legal ... I haven't seen the composite prop rule yet. But for Q-40 Sport with a TT Pro 40 and a 9 x 6, it should do well.
Even though I'm setting it up for a 1.5" spinner, a 1.75" could be used. The front edge of the cowl will be very rounded, but I plan to leave enough of the rear edge to get approval. If they come back and say I can change the cowl shape, it will be easy to do.
I've got to make a Swee' Pea wing for somebody this week, so I'll have one to fit it to. I should be making the H-1 mold by next week at the latest.
Mr Speedy