Some concentrated sproing.
Thanks to don.r, for shipping me these very deadly and US-government restricted (not!) lengths of 0.002", blue tempered spring steel. That McMaster Carr had refused to ship overseas.
So now finally I can attempt cutting some for replacing lost old-style HP button springs. I did end up with enough original HP springs, thanks to some kind donations. But there's still the mystery of how to actually make those things, for future HP gear missing the button springs.
Once again, if anyone knows what the spring material actually used by HP was, please share. It was 0.002" thick, felt about as springy as this, did not deform when bent, but was silver-shiny color. It didn't rust. and I have a feeling this stuff will, but that remains to be seen.
Second picture is not something I bought, but rather a paper-wasps nest that bought it. Bug sprayed at night, after I had three stings over the last couple of weeks from these guys. You just walk anywhere within a few meters of their nest, and they attack. Will follow you quite a distance. There were maybe 50 wasps sleeping on the nest, but most of them fell in long grass.