I really appreciate the help, guys. The Vogel brackets are just too small, and I only need vertical adjustment. I'd have no problem with a greater projection, since my mains are floor towers, away from the wall.
So far, this looks like my best choice:
It allows for almost unlimited vertical pivoting, has a large mounting surface for both wall and speaker surfaces, has a white half (wall) and a black half (speaker).
I also like the 4"sq. hole on the plate for the terminal access. Plus, it seems the heavier the load, the greater the 'bite' the moving section has on the rods, so there should be no "brewers droop".
Thanx again. Anyone else? Going, going...
Larry