HP65 Loosy keyboard

[isanchez]

Dear all,

I have seen a previous post regarding the "feeling" of some HP65 keys. This is usually because the metallic flex breaks due to the use. The only solution is to replace this flex, which is not very easy...

In my case, the problem is that the six inner screws that fix the keyboard in place do not press the part properly. This is caused, probably, by the plastic holes fatigue. This makes the keyboard sounds like a rattle, the keys sink a little, and an there's an overall lose of that "click".
I am not sure how to fix this (at least I do not want to worsen it). I am not sure if longer screws would work (the actual ones are quite long). On the other side, I have tried to use some teflon ribbon to thicker the actual screws with not so much success (apparently the teflon does not pass the first hole, so it kepts there avoiding its mission...
I am open to suggestions (I have seen this pathology in some classic calculators, in combination with the flex breakage for some of the keys).

Thanks in advance and kind regards

Ignacio