42s exit key repair by 17b

[hamishbarker]

the enter key is loose again. It's going to stay that way since to fix it requires drilling out the epoxy I used to secure the membrane.

A couple of keys are not quite perfect. I should have set up clamping interior to the metal backplate not just at the edges while the epoxy set. They work but the action isn't quite as crisp as the 32sii I have for comparison.

It certainly is a committing fix to have to drill out the 50 or so heat stakes. But since the calculator was otherwise junk, there was nothing to lose.

It's such a shame that the 42s has no electronic interface. there are so many interesting looking 41 programs! I guess they don't take so long to key in...