Anyone repair transmitters?

[Neil20vtc]

Hi as the title says anyone on here repair transmitters I have a sanwa gemini x and the throttle pot has gone bad, I get full throttle at 1/3rd of the travel the rest of the travel makes no difference

I have tried all different settings etc, the throttle is fully progressive when the esc is plugged into the steering channel so def something to do with the throttle pot

Someone at my local club mentioned a chap called Derek baily used to do stuff line this don't know if he is on here?

Cheers Neil