Any classic design that had pronounced stab anhedral, also had significantly more wing dihedral. Absent that, the model would not knife edge very well. Anhedral designs also typically have stabs placed at a higher draft because the anhedral lowers the "effective" position. The prime example of these extreme angles in di/anhedral design is Hanno's Magic. The counter design concept would be Naruke's Aurora (thin flat stab and rather thin flattish wing coincident and close to the thrust line).

Bridi's idea behind the thicker stab airfoils as the tail moments increased (UFO, XLT, Escape) was to lower the stall speed on the surface allowing it to produce lift at slower air speeds. I guess the concept was to have the model fly on the wing and the distant stab.

At least this is my understanding.

David