After looking at your test unit I like it better than the factory one. You mentioned the possibility of having provisions to remove entire corner if needed. I would rather see a knockout for a U shaped notch about .25" wide and about .5" deep. I would still take one as is, I can always dremel out a notch if needed. Since my car is a Ti with black leather interior, either dark gray or black is fine by me.
13 Blue Flame F150 FX4 402A on 20's loaded
13 Frosted Glass Escape Ti 401A loaded
13 Performance Blue SE 201A
14 Dark Side Fusion SE 200A
L-CCC #18/HOIA #37