[klem]

I have similar problems. My switches, especially button C (Tx) comes and goes. My Throttle thumb rotary is noisy at the centre so I use it for a non-sensitive function (mixture) and have re-assigned Elevator trim to my old X45 throttle thumb rotary (also use X45 for RPM and other stuff).

You can get replacement switches (mini diaphragm types) on the web but I've never found a source of the flat rotaries in the throttle. Saitek support company is useless, they won't sell parts. Saitek used to be very good at parts supply but they changes a couple of years ago.

Some people squeeze Hall Sensors into the throttle but it looks a bit daunting.