Thanks for the update/addition!
iluvmacs said:If I may offer any suggestions... these are what they'd be.
To remove the wire bracket I removed the top nut without a problem. I then took the wire out of the bracket. With a screwdriver I wedged the bracket up so that I could get a socket onto the lower stud. That made it much easier to get at.
I put a regular sized 10mm socket on there first, then I put a 2.5-3" 1/4" extension on it, which I then turned with a screwdriver. After loosening it I could turn the socket extension by hand, and then the nut by hand.
That's as far as i've gotten. I need some 1/2" extensions before tackling the actual mount.