AHM32 toggle buttons

Hi all,

I am using a AHM to enable / disable FOH mixers to the main PA.

I would feed input 1-3 with LR/Sub

What I would like to achive is:
Button 1 : Mixer on/off : using LR + Sub
Button 2 : Mixer on/off : using LR (Sub will be fed by summing LR)

I would fire a preset to do the right actions (change fader positions op crosspoint faders).

My main issue that I can’t put it off when a mixer state is on… The easy solution is a third button to put the mixer off, but that will cost me one button on front.

Is this possible?

regards,
Pascal