Had a retro moment on my current Ryzen hexacore today. I still swear by Microsoft Trackball Explorers. They are great and they are fortunately solidly built. But after a couple of decades of daily use things start to fail.
The past few days, the right mouse button on my main unit was getting less and less responsive until today it basically completely failed. So disassembled it, found a loose connection and gunk. Cleaned, re-connected and started to re-assemble, until the plastic of buttons 4 and 5 shattered. I had been very gentle, it had just degraded to the point of being too brittle to be handled. Tried to super-glue it but that changed the length subtly and it no longer fit...
So I grabbed my for-parts spare, one that had had a cup of coffee poured over it then dropped. Bad scratches on the top, missing RMB plastic and lower PCB polluted, but otherwise much newer. Took both apart and basically merged lower half of the used-up unit with upper half of the spare. End result on the right, bad bits on the left.
The attachment 16576241960960.jpg is no longer available
It's alive again!
Some issues with scroll wheel though so need to open it up again. Worst-case I still have one more heavily used ones and two basically new spares. Am seriously considering finding a 3D scanning service so I can disassemble one of them to scan every case part for later manufacture if it fails - even unused plastic gets brittle and the day will come when the last unit crumbles. As there's no sign of a decent replacement (and yes, I've tried pretty much every alternative out there), I want to be ready.
Edit:
Yep, scroll wheel completely died after replacing the parts. Now had to re-replace with the old one. All working now, thankfully.