Well it appears that I've outsmarted myself this time.
Awhile back I picked up an Odyssey PC625 battery. Its a tight fit, and a bit taller than stock but it fit just fine.
Today I received my new Corbin Saddle. The Corbin comes with a bracket that attaches to four holes in the frame, just above/behind the battery. The bracket allows the seat to be installed/removed with a key rather than the cumbersome, stock bolt on arrangement.
However, that powerful PC625 is just a bit too tall to allow the bracket to be installed. I'm now charging the old Yuasa, having a couple of beers and contemplating my next move. Unless I figure out a way to modify the battery box (its a real pain to remove), I'll probably be going back to the stock battery set up at least until I decide whether or not the Corbin is a keeper.
Just a word of warning to anyone considering a similar combination.