It sounds like there was both yoke and endshake issues. Solve the yoke first. 1. Take out yoke screw, remove yoke, take hammer and wack the sumvabic at 2 o'clock. Slide back in put in, close, reinstall screw and see if yoke is tight fore and aft. If not wack that sumvabic harder and try again. Once that is done measure at the forcing cone to cylinder. If over .001 order the shim needed to bring it back to .001. If that doesn't work get a real big hammer and really wack that sumvabic and throw it in a lake.