The aluminum piece shown in the photo around the BB shell of my 69 Schwinn Super Sport, I've got a BB adapter I want to install in order to have a 2 piece crank and this little metal guy has got to go, my assumption is that with a large flat head screwdriver and a mallet I can just kind of force the thing off attacking each side from inside the shell on the opposite side of the piece I'm trying to remove, that is unless someone else knows a secret.