[What's_nitro?]

It's the gremlins, again. This one is stumping me. I would also say it's a bad ESC, though I can't figure out why. I can't explain why the servos failed either. You could take it a step further and assume it was a defective reciever that caused all the trouble. You said you tried the defective gear with other recievers, have you tried the reciever with other expendable, but otherwise functional gear? The signal coming from the reciever may be too strong, and it is frying the brains of your gear. Maybe a shorted resistor in the reciever allowing too much current to pass? *Idea* Maybe HRS has something ot do with it. Try other gear in non-HRS and confirm that all works well over a long period. The switch on the HRS and see if anything changes. Just a thought.