I know iFixit sells screw extractor bits that apparently work well, though I haven’t tried them myself: https://www.ifixit.com/products/precision-screw-extractor-set Might be with checking out these or something similar
It’s kinda cool (to me at least lol) how literal the terms “additive” and “subtractive” for color mixing are. With additive mixing (such as on a computer screen), you start with black and add the primary colors (RGB) in different combinations. If you add all of them you get white.
Subtractive mixing (like pigments) starts from white and “subtracts” those same RGB colors. You can think of cyan, magenta, and yellow as “minus red”, “minus green”, and “minus blue” respectively, since that’s which wavelengths thise pigments absorb. So mixing cyan and magenta for instance gives you “white (RGB) minus red minus green”, which leaves only blue.
Just to clarify, with pigments (subtractive color mixing) the primary colors are in reality cyan, magenta, and yellow, which is why printers use CMY (and K, which is black). Blue and red are kinda close to cyan and magenta though, so those are sometimes stated as the primary colors along with yellow even though that’s not exact
For what it’s worth, the multi-user experience in my case has been pretty seamless. Here’s my setup if it helps anyone:
My roommate and I both have separate steam accounts (it sounds like you may be looking for a ‘child’ account or something like that, those may be a thing but I’m unfortunately completely unfamiliar with that, so ymmv if you use that).
We set up family sharing between us to access each other’s games, but did that I think entirely on a computer via that steam client. No pins or anything were necessary iirc, just a slightly convoluted sequence of logging in and out of steam on the same computer and clicking the needed ‘family sharing’ buttons.
Then I set up the deck with my account, logged out, and had my roommate log in. There’s an option somewhere to start the steam deck at the account select screen every time it turns on rather than automatically logging in to the last used account.
It sounds like most of the difficulty is coming from the family sharing setup. Like I said, I’m not knowledgeable on if steam has ‘child’ accounts that can be linked to other accounts, if so it’s possible that none of what my process was like applies.
Hopefully that’s at least somewhat helpful