You need 12 extra inches? Why not ask the drummer to bring along fewer tom-toms, or a few less cymbals, or use an Octo-Pad and a module, if space is THAT tight...?

Then you will quickly find out how most musicians view making compromises to their rigs for the sake of space... Why is it always up to the keyboard player to accommodate everyone else?

Me, if I'm on a tight stage and there is a width problem, I'll set up sideways... Ta-daaaa!