Calculator repair fun

This is a perfect example of why I never throw anything away... a couple of months ago I found a nice Craig (Bowmar) 8-digit calculator at an antique mall for $3. No charger, so of course it didn't work. Finally got around to disassembling it - the six AA nicads had leaked grossly but fortunately did little damage to the board above it. Powered it up from a bench supply and promptly discovered that one segment of one digit wouldn't light... not much good in a calculator since 8 and 9 looked the same :( But - I looked in my "LED drawer" and there was a little PCB with eight MAN-3A displays mounted on it. I remember buying that out of my pocket money at Radio Shack (couldn't have been Poly Paks because it works) when I was about 12. And that was thirty-five years ago... It was the same overall size as the one-piece (bare LEDs with bonding wires beneath a glued-on red lens) display PCB that was in there. And a battery and resistor showed that it had the same common-cathode matrix, and even the same number of connections! I unsoldered the old display and double-checked that the one digit's segment was indeed bad - put in the new display, powered back up and it worked 100% :) I even had two three-packs of AA nicads bought at Marden's (an odd-lots store in Maine) several years ago because they were on sale... so I installed them in the base, screwed everything back together, the calculator is now working perfectly! So that's why I never throw anything away. Who'd have thought that an LED display stick I bought over 30 years ago would find a home in an early 70's calculator... in 2009. Of course now I have yet another vintage four-function calculator I don't need, but it still feels good to fix something that would otherwise have ended up in the trash.