Yes on Carbon...
no on cracks....although the inside of the luff track is tapered a bit at the entry slot, I presume for ease of boltrope entry, although I might be inclined to fill in the taper if I thought I could get it right.

I undoubtedly have been guilty of overtightening the outhaul based on what you guys are saying....that's an easy fix. I'll apply the lesson learned next weekend.