Hi,
I think you will have to create an action in the TCP action source list. You have to do that for every fader you want.
You need to give it a text string, and add the value of the fader with an equals sign in between. Example: mycustomfader=100
In showcontrol in the TCP action, you give it a trigger. Make that 'mycustomfader' for our example. (you can choose this yourself, it doesn't have to be mycustomfader, as long as it matches the TCP string you are sending.)
You should now be able to use the fader in Showcontrol.
Good luck!
Greetings,
Bootsy