No problem. Crawmerax is a pain in the arse fight, although there is a good hide spot where you can almost solo him. I could knock down all of his parts except the back because he won't turn around, so I would box a second account and run that character up and to the right to get him to turn so I could get his back spot. But I remember trying him for the first few times with 4 people and we had major problems. If everyone dies before someone could get back up the elevator his health resets, you always need to have one person alive up there so he doesn't reset. So having a siren helps, because they can escape before they die and give others time to get back up top if they die. If you need help lemme know.