mackrackit suggested that I use a third RC channel to toggle disconnecting the PIC when under RC control. It does sound like the simplest and maybe the least expensive way to go. Trouble is I do not know how to do this.

Is it as simple as inserting a double pole double throw switch that is controlled by the third channel into the signal line between the RC receiver and the electronic speed control? And another between the receiver and the steering servo?

Will surges and the like kill the electronics? It would be safest if there were a way to guarantee the motor being off and the servo being neutral when toggling. John, mackrackit, what do you think?

Ken