You could also try doubling up on hotkeys using Shift+, and then even Ctrl+Shift+ if you need more. I personally use various combinations of Ctrl, Alt, and Shift with a single key to use all my mounts, but I also have a keyboard with a secondary 'gaming' keypad set up offset from the main board, so I don't know how practical my method is on a standard keyboard. Still, I can't imagine using Shift would be too much of a hassle, unless you use that for something else. Edited for spelling, because autocorrect is dumb.