[EricH]

It would be a custom circuit. I don't remember any rules saying it wouldn't be legal; granted I don't know the exact setup you're thinking of. Note that it would count towards the 30-lb withholding allowance. You'll need to pay attention to the custom circuit rules.

You could also use the microswitch to trigger a display on the driver's station to do something. Remember, you want to be able to see the LED from the other end of the field--that's harder than it sounds.