My Mac Plus won't eject floppies, unless I use a paper clip and the "manual eject" hole. Does anyone know where the problem may lie? Would I need a whole new floppy mechanism, or is it possible this one can be salvaged?

If the former, does anyone know where I might find one? I've also got an 800k external floppy drive that works fine; in the time being could I drop the mech from there into the Plus?

Thanks for any tips!