Made a purchase from bhphotovideo.com
I ordered this:
Bogen / Manfrotto BO2900
2900 Super Clamp with Standard Stud X 2
Avenger AVE600C
E600C - Snap-In Pin for Super Clamp - Steel, 5/8"
Bogen / Manfrotto BO2917
2917 Joining Arm - for Super Clamp
Bogen / Manfrotto BO3352QL
3352QL - Air Cushioned Quick Lock Light Stand - 11'
What I'm envisiong is one super clump on the stand and the second connected with the joining arm at the same angle to the disc can be mounted at 90 degrees without obstruction from the stand. We'll see if this will work the way I think it will.