It kinda annoys the shit out of me sources don't check finished product especially if they make 1000ml batches that's 100 vials you can't test one?.. I think they are scared of having to scrap a whole batch .. and the risk reward seems more appealing to them to just keep pushing till someone bitches about a bad batch .. even when a problem arises I guarantee a source usually doesn't replace the whole batch they only do to customers who are aware/ complain