Mike,
Landing gear???
I would think retracts would be more appropriate. What type of prop do you use with a OS91 df, they spin at around 20,000 rpm wonder what type of tip speed that figures out to.

I can't wait to hear what type of speed your present airplane can reach.
So I take it that engine temp was ok, did you run it with the cowl on during your ground break in?

Regards
Paul