Last week at the field I noticed the rudder and aileron trim levers were not working. Tough when my RareBear is flying at 150 km/hr and out of trim.
It took 15 minutes to do the changes. About 5 years ago I had the same problem and Bruce Weaver sent me a link on how to do it. It was surprisingly easy.
I have one spare parts transmitter because one of the display panels burned out from being left exposed to the sun.
Photo 1- shows the left "ear" of the trim lever broken
Photo 2- the screwdriver is pointing to one of the two screws that was removed to access the lever.
Photo 3- shows the trim lever board removed.
You can Google videos to show how to replace a trim lever or a display board.
Frank