I've just sent an email to Andy from Ultimarc as well, just wondering if anyone else had a problem like this?
Initially the one U360 had some centering issues, but I sorted that out with the custom mapping. The joystick was also a bit "sticky", but I thought that's just the way they are. Yesterday I played on the other U360, and it's like day and night.
The one, when you move it and let go, the joystick slowly goes back to the center. The other one, when you move it and let go, it snaps back to the center immediately.
I bought them together, so they should be from the same batch etc., why the big difference? How can I fix the one that's a bit sticky? Will something like Q20 lubricant work?