You could just push the thing off your kitchen counter or something, and that way not mess up your wall.

Or, do the smart thing and brace the wall. Be prepared to do some drywall work and get things real dusty, but if you want to do it right, this is going to be your only option. 24" spacing provides its own set of problems to start with, better deal with them the right way the first time or you are going to pay for it down the road.