I'd be surprised if Castle covers this w/o a fee.. you obviously took the plastic cover off changing castles design and voiding the warranty. With the heat shrink that castle has on the motor output wires and the support the plastic case gives near the top it keeps this part from moving at all, I say the only design flaw is in your own changes from the looks of it. I guess we will see, but I've been running MMM's since the first batch of V1's and never had this issue, still have a v2 going strong in my erevo and 2 v3's in my 8ights (truck and buggy).
PS you may want to try a new mounting location in your 8t
