It depends on how worn they are. You could probably reused the gliders if you are careful when removing them. I did end up replacing mine though. Here's some replacements: https://www.aliexpress.us/item/3256805149791432.html
Wow that swelling problem is mysterious!
If 3d printing doesn't work out: https://www.aliexpress.us/item/3256807056619542.html?
Signal is probably your best bet for a solid user-friendly (and privacy respecting) experience with calls. Matrix/element is another decent option (its federated like lemmy and mastodon) but a bit less intuitive.
I can highly recommend this! The switches are very cheap and I love my silent G305. The hardest part was probably the middle click button but you can skip that one if you don't care about it as much. While you're inside, you could clean the scroll wheel which might fix your swelling problem.
Here's the switches: https://www.aliexpress.us/item/3256803887113310.html And the video: https://www.youtube.com/watch?v=VKPUPIjv1kI
I am not very skilled with solder and found it very easy. You don't need anything fancy like a desoldering gun. Just a regular soldering iron with some solder and flux worked for me.
There is a very small amount of red shift. If you were standing on the equator watching a sunset, then your radial velocity relative to the sun is only ~461m/s. So the green light from the sun 550nm would be red shifted by +0.0008nm. That little red shift wouldn't be noticeable. However, as the sun sets there's a lot more atmosphere in the way, which scatters blue light more than red light (Why the sky is blue). Also in a sunrise you are moving towards the sun, so sunrises would be blue! :P
You can read up on it here: https://community.frame.work/t/responded-coreboot-on-the-framework-laptop/791
It looks like they're making progress! For now, you can get the Chromebook version, which already runs coreboot.
