I scavenged a bike from my shop to use as a commuter bike. It was abandoned by a customer who got a car instead. I'm stripping it down and building it back up, replacing parts as needed. I've gotten everything out but part of the bottom bracket. It's a ring, screwed into the driveside of the bottom bracket shell. I've tried everything I can to get it out, and no luck. The ring has no slots for a spanner, and no visible way of getting anything clamped onto it, short of two flattened parts which I can barely grip with an adjustable. Does anyone have any idea how to get this part out? I'm replacing the bottom bracket and need this part out to fit the new one in. The bike is an extremely old Diamondback Parkway.