Just wanted to share: I had this quite big crossfader failure with my OT on my first live show and I dismounted it to check what did happen and I found out that the magnet of the fader that is glued to the moving plastic part of the fader just got detached during use. I just glued it back and the fader is working again. Note, you have to check if the magnet is in the good orientation before gluing it, otherwise the fader won’t work as expected. To check it you can go to test mode (func while powering the OT on + trig 1 after) and move the fader to see if it’s properly set (trig 1 should be green when you’re full left, trig 16 green when full right).
We can see on the pic the magnet that went free inside the fader.
I was using my OT heavily for 2-3 months and this had to happen on the first 5 minutes of my first ever live show.