Hi funkyfallk,
I replied to you via PM, but will explain in short for everyone else.
The locker is a modified 100% locker that was mostly built for Jeep Wrangler and adapted to my axle. It uses vacuum from the generator which switches a membran, which pushs or pulls a locking bolt into the axle. It is necessary to stop the car, trigger the switch, do a few meters with a turn or wheelspin on one side and then the diff is locked / or open again. Quiet gruff, but works fine (as long as it works). Right now my membran is broken and I do have problems to get spare parts. Will let a friend reprint it on a 3D-printer and see how it works.
I would suggest to use a compressor rather than the vacuum from the generator, as it is used for the breaks as well.
Cheers