RE: Radio Controler
Oh dear--
The problem with the steering is the least of the problem - -the type acceptance may be outdated to boot
the really older stuff had no switche - just trims -
the servos had removable pots so you could do the pot wires and motor wire swap and after recentering the pot -the servos worked -providing the pot was correctly installed.
If I was this guy -I would get some hands on help .