OK, my first idea was a case of premature extrapolation.
I do apologize. Let's forget that incident ever happened. Who knows, maybe someday you'll find a use for the CALS.
It may actually be possible to do fairly easily (fingers crossed...). I'm not familiar with ACT but there are other options using the Remote option. Problem is I have no controller on hand to confirm and I'm using 8.5.3 not X1 so there may be differences.
In 8.5.3 you right-click on the Input Echo button of an audio track and an option will show called "Remote". You can assign MIDI control to the Input Echo button/switch, be it note, controller, mod wheel, sysex etc. to remotely turn the echo on and off. In -theory- (says Homer) you could use notes (keys), for example have the note C1 turn the input echo on and off in track 1. If you have ten plugins on ten tracks, in -theory- you could use C1 to activate/de-activate track 1, D1 to activate/de-activate track 2 etc. Of course if this works you could use any MIDI control method you choose to allow turning each track on and off, so to speak, via the Input Echo switch.
One drawback is it might require hitting two keys/buttons not just one as you might want to disable one track and enable another at the same time, although in -theory- you should be able to press two keys/buttons simultaneously. One benefit is this would easily allow stacking multiple sounds as well - you could play thru any two, three...for that matter all ten tracks simultaneously.
Keep me posted if you get a chance to try it, as a guitarist I find it an intriguing idea.