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With only 2 screws into the plastic housing/cover to take all the button pushing, they break after 25+ years.   An idea of my mech. worked out pretty well but wasn't easy.       1. Removed busted plastic where stripped/cracked screw housing busted. 2. Using a straw to fill, I put in some JB Weld 3. After a day to harden, used the Dremmel to take it down to the right depth 4. Starting with a 1/16" bit, drilled screw holes and worked up to size for screws to take 5. Put screws in VERY slowly as t