A few months ago I was looking into how to make a trigger-controlled clutch. After testing a bunch of concepts (thanks for the suggestions) I ended up with this contraption. Basically an onboard air compressor and accumulator tank. Air cylinder works the clutch master through a bell crank. The electronics get a position signal from the air cylinder that is proportional to the trigger position mounted on the gearshift knob (scavenged an old xbox controller for the trigger and potentiometer) and powers a high speed air valve that opens and closes the air cylinder. So far all the mechanics work and all the electronics work - Just have to finish up and put the two systems together. Added 12 lbs to the car. It wasn't exactly cheap, but it's definitely grassroots. The black box definitely has a matrix/borg kinda thing going on.