Nice video, gunny.
Relative to yours, I drilled mine just about halfway in between your two (pin in ring finger) and mine acts not as flippy as drilling #2 nor as arc-y as your drilling #1. Still has a surprisingly strong backend.
With the stock surface, mine was susceptible to carrydown and very sensitive to it.
Been playing with the surface but nothing seems to work as well as the stock one or very slight change (1500 grit + polish).
