upward deflection of the HL

Of course if we had enough HLs for enough fields "deflections" could be studied -- average length, degree of deflection, etc.

It would be nice if some HL curves were shown for truly end-of-output conditions. In the Texas case I expect the HL curve to start heading down in the next few years for a URR below 70 Gbl instead of keeping at its 2006 trend towards a URR higher than 70 Gbl.