Thanks for the tips everyone, upon further inspection looks like there was a defect in the C hub moulding (lots of air bubbles in the centre) so could of been weaker.
I also have ordered new plates ball's etc and will tear the diff down tonight to inspect. Also have a gearbox case and the sumo camber plate coming.
Good tips on the diff tension also, everyone at the track thought I had it to tight but they all run TLR AE and Kyosho.
It's all learning I guess.
I also followed the durango MIP build video exactly.
One final question do the front camber ball stud rip out like the rear ??