I can now answer my own questions about the durability. It is quite brittle.

I sanpped the wings pulling out of a dive, the landing broke the fuselage and the motor mount.
Lots of epoxy and additional carbon spars later, nnow creeping past 15 oz AUW it flies again.

I just can't get my CG back enough with a 2212/34 and 1500 Kokam 3 cell. It is right up against the bulk head.

I think the plane needs a bigger elevator also.

Looks good and flies OK but is heavy and breaks too easily.

May go back to a simple foamyfactory or try a shocky.