Shift +% and Shift -%

It would be awesome for us nomad users and people who don’t like the intensity wheel to have the ability to change the +% and -% with shift. I would like to be able to select a shift +% and shift -% amount in the CIA so I can quickly change from +/- 10% to +/- 5% or +/-1%. I could do this with a macro but shift would be so much nicer. Maybe even have a third +% -% option by pressing (shift)(at)(+%) or (shift)(at)(-%).