This is sort of not related, but some ratio equipment is very susceptible to vibrations, as I found out today when my car decided to kangaroo and steer left and right erratically when it shifted into 2nd. completely puzzled by this I started to diagnose the problem. guess what it was, it was caused by an unbalanced wheel of all things! it vibrated so much so when the car went into 2nd gear the rx would malfunction and throw out incorrect signals to the servos, no loose external wires just an rx that hated being shuck around!!
and they say solid state electronics is completely shock resistant, yeah right!
I bet when I take it apart I find a dry solder joint or somethin