I just picked up a slayer for my own little Christmas present and on the 4th tank of breaking it in, it locked up. So the next day I drove to the nearest hobby store and picked up another 3.3 (pull start). I got through 5 tanks for the break in and then on the 6th tank (keeping the engine on the rich side for "safety") it locked up again. Will traxxas replace my engines or am I just s.o.l.?