RE: need help with rs310
Well I shot that theory out of the water. The MX-3 will operate the RS300 just fine so assume the 310 will be fine as well, there must be another problem. I just tried mine on channel 68 and it was fine... the trims were different but that is not unusual. No glitching either.
Did you try the second switch on 1 maybe? Since you are setting channel 81 not the frequency of .810 I believe that might be your problem.