I've got a bit of a problem. Just bought a Doctor Who. Started rebuilding the right flipper. Started taking out the screws on the bushing to replace it and the screws broke off in their hole - all three of them. After trying to take the whole base assembly off the bottom of the playfield to get a better look and see what I can do, it looks like glue was used on the base assembly screws, and maybe some of that also got on the bushing screws. In any case, the base assembly is glued on the playfield and I have screws stuck in the bushing holes. So what are my options here? Try to drill out those screws somehow?