Ya know what, this absolutely makes my blood boil. You entrust these guys to do a proper job and you pay top dollar for their service, then get treat like sh1t. How the fook can they forget to do something like tighten a bleed nipple up is beyond me, and as for the oil looking like turd after they were meant to have changed it and its meant to look like that, well, i dont know what automotive engineering back ground they have but when i've changed my oil you can still see through it for at least a couple of weeks. Finally all i can say is you live and learn, and that is the reason i do the majority of work on my car myself. Fook stealers and fook their stamp, at least i know i'm safe. Rant over