Our local machinist had it all torn apart and couldn’t get it fixed. Went to the bigger shop.
Then you have the newer electronic airbrakes wtih a service zone about 2 microns wide. Not really made for switching with. They do realize there needs to be something between min and FS, right?
Couple those short travel handles with one that’s stiff. You end up setting way more air than you wanted. I’ve had a few where you have to really slam that handle back from the service zone to release, otherwise if you’re not paying attention all you’ve done is moved it back to the minimum reduction position.