It's a tight squeeze but I have been able to unscrew and remove the can without the need to unbracket it. The waste oil doesn't fill up the can too high so I'm able to tilt the can to get it out.I know this is an old post, but are you able to unscrew the bottom of the occ without removing it from the bracket? I can't tell from engine bay pictures I've seen if there is enough room to leave it mounted and empty it. Unless removing it from the bracket is super easy and allows for removal of the bottom cup. Thanks!