Scott,
Hi...
I would have to look in the manual..but, you could use a midi foot controller with a lot of pedals to switch the Reg's, STS's and lot's more.

The T3 is excellant...maybe a little MIDI work will get you around the physical concerns on the switch placement.

Don't know how much MIDi stuff you do, but if I can be of any help...just let me know.
Lee S.