Got a flux and drive shaft pins on the 11x123mm dog bones are slipping out...
It has happened on 3 different dogbones.
Would it help to stick those suckers in there with tire glue?
sounds like there was a bad batch of dogbones. Im sure HPI would take care of it and send you a good one, just call them and see. On a side note, one of my dogbones did the same thing, i just set it on my vice and pounded it the other way, has been fine since.