RE: eight-t burning servos???
I've seen quite a few complaints on the forum about throttle servos burning out so not uncommon but ya, shouldn't be normal. I've had my 8ight-T RTR for a couple months with 3 full days of racing and the stock throttle servo is still working fine on mine.
Check the setup on the throttle carefully. There should be an addendum to the manual explaining the recommended setup. That was one of the first things I did when I took it out of the box and like I said still going, knock on wood.