Timing Disable Button Mode for Subs

It would be nice to have a mode for bump buttons that ignores the timing of the bump button and snaps on and off when pressed and released. The reason I suggest this is to save space on my fader wing. Right now, I like to have even/odd bumps for busking, one of each for beam, spot, and wash with a .5 down fade and one with no down fade. Depending on the flow of the music, I might use one or the other. but since I use the same selection and intensity, it could be compressed into the same sub and I could just reassign the top and bottom bump buttons.

Thanks, 

Tyler