Game Input MultipleXer

I have a homemade seven-speed transmission

how to add the gear shifter 7 button to the configuration EMUG29PS4?

I want to understand how remote management works

please follow the instructions for remote connection!

There is a Logitech Driving Force GT steering wheel and an H-shifter defined by the PC as a separate gaming device. How to edit LogitechDrivingForceGT_G29.xml to fit the h-Shifter axes there?
What lines in LogitechDrivingForceGT_G29.xml for the H-Shifter?
UPD: The question is removed, sorted out.

What does error 935 mean?

kaiba_seto2004, thanks a lot for your help!!!

Thanks a lot, but there is a problem when you click on the autodetect button, the Gimp-config program hangs and does not respond to anything

can you give an example of how to do it?

Now I have a steering wheel connected through the gimx adapter. Can I still add a standalone device (shifter or clutch) at the same time as the steering wheel?