[Brian86]

Neat. Hope you figure it out.

There is probably a proxy sensor on the motor shaft the computer uses as feedback for "% center clutch engagement". It's not terribly complicated, but no idea if there is something commercially available that can operate it. Beyond my ability to fabricate.

Might be stuck programing a raspberry pi to 'apply voltage to motor until hall sensor clicks X times for 50% engagement' or something like that.

Presumably there is also a hard mechanical stop in the disengaged position, and the computer uses current feedback (locked rotor) to 'find home position'

The ATC300 slightly overdrives the front axle, so the T-case is never really 'locked'. The difference in rotating speed at the wet clutch is what pushes 'torque' to the front tires.

Might make for some interesting driving dynamics if you manually force it to maximum engagement for an extended time. Might be necessary to consider some sort of fluid cooling arrangement if it's going to be run that hard as well.