Scott,
That's the only place that I sit, unless it's an acoustic job. The owner spend about $700 on the psuedo-piano shell that houses my keyboard, and it was made to look like a spinet piano ..... so I can't adjust the height of the keys. I have a tall stool, and I often get up during the night just to relax !

If I use MY stand ... I stand.
As to back pain:
I try to limit the overuse of the susatain, but I really do use it alot on piano parts. I get a break when doing dance tunes on organ or brass, and I can readjust to a shouldar width stance on both feet. Ahhhhh....

Playing Clav parts also does not require sustain, so I get a break on the funky stuff too.

Terry ....
No dogs or ponys in my future shows ..... guess you'll have to watch "animal planet" for that level of entertainment.