41CV new owner questions

[Dave Britten]

I finally lost control of myself and purchased a 41 CV. The good news is that it's in great shape - all four module port covers are present, there's no sign of battery corrosion, and the labels and rubber feet show hardly any use. It's a 1983 Singapore that appears to be a fullnut based on the appearance of the display. I've got plenty of digitized manuals available, but I have a few more idiomatic tribal-knowledge questions that don't lend themselves to manual research.

Do I need to worry about any kind of preventive maintenance? I'm mostly thinking about the couple of big 30-year-old electrolytic caps. Should I replace them preemptively, or is it enough of a hassle/risk that I'd be better off waiting until trouble arises?

What are generally considered the must-have accessories, if any? I've got X Functions on its way (should be arriving tomorrow), and Advantage is already on my shopping list. Is it worth getting an X Memory or two, knowing that I'd mostly be using the space for program archives?

Also, does X Memory survive a software-initiated all-clear, e.g. ON+Backspace? I know it obviously won't survive a power loss, or a really bad software crash that stomps all over the memory, but if I start experimenting with synthetic programming, it would be nice to have some near-line storage that's slightly more durable.

Where can I get ahold of pencil-friendly keyboard overlays? Modern aftermarket overlays are fine, as long as the quality is good.