All of my glitching was a result of poor antenna placement. My antenna was routed very near the 3-1 power leads, and then in a straw along side the tail boom. I moved the antenna back to stock position and glitching disappeared completely. I think if your antenna is in close prox to your motor power leads then perhaps increased current due to a bad motor could cause glitching. I do not have a hh gyro (one is on the way!) but i have heard that strong hh kills the motors faster. i have been flying for nearly a month, at least 3 batteries a day, just hovering, and I have not killed a tail motor yet, but a main did die the other day (but this was a bushing failure).