Ball Diff dex 210 !!!

[eldridge_racing]

Hi guys, having trouble with the ball diff which ive heard everyone has had (put gear diff in straight away when kit was bought) and im no stranger to building a diff as raced TC for 7 years....so far i have spent 5 hours trying to set and build this durango ball diff and everytime it either locks up on the diff outputs and slips on the gear or it just slips regardless when i try n break the diff in....so far i have changed

Circlips
Thrust race
Diff screw/sprin and t-nut

Anyone able to help as really loosing faith as really want to run a ball diff

Cheers