Non-invasive switch repair for Classic?

[John R]

Thomas, Geoff: thank you both for your suggestions. I think that for the moment, I will leave the HP-70 alone. However, I think I will practice Geoff's label-removing techniques on one of my old HP-45s -- I have two that are in pretty beat-up shape, and they would make good surrogates to hone my skills before trying my hand on a more prized specimen.

Also, Geoff, like many here, I'm eagerly awaiting the completion of your book!