mhm21,
Those are really kewl pictures. It's an excellent thing your sharing them with us. I hate to ask a favor, but......

Is it possible to describe your test profile as having a straight taper to the TE? Most of our stab/elevator and stab/rudder planforms have a flatplate stab with a rounded LE and with the elev/rudder surface having a straight taper to the TE. Usually the TE isn't "sharp" (It's thickness isn't 0.). It's usually a square TE, but is most often less than half the thickness of the stab and the LE of the elev/rudder.

If not, then thanks for sharing and for answering the extra request above. It's been informative.