Went for a run out on Saturday.....lasted all of 45mins before......no drive.....thought the box had jumped outa gear but.......the chain had snapped!

I'd just fitted a 520VM DID C&S kit less than 900miles ago, it was tensioned & lubed correctly, two of the links (not the soft link either) had snapped! I've returned it to the dealer in question who's sent it back to DID for "examination" just wondered if anyone else had had any problems?