"Characteristic". That sounds better. I have found deltas to be very stable at all speeds so far. My Shrike, not really a delta, with a sharp leading edge would snap roll in a tight hi speed turn.

I just downloaded Profili and printed out my wing rib templates. It looks like every rib will have to be modified slightly to have a 3/8" trailing edge. Hope that doesn't have a negative impact on this high speed airfoil.