If such a thing exists (DIY paper printers), I would like to know more, because the level of frustration I have with all the major printer mfrs I've used, is too damn high.

Bonus points if it's a laser printer, extra bonus points if the components for the printer can be 3D printed (with obvious exceptions).

I just want a good, wired, network printer for everyday crap that I can use once in a blue moon for stupid documents that someone wants me to print, sign, scan and send back to them because they haven't figured out how to do e-signatures yet.... And the odd extra thing I need to print. Every time I print it seems like I need to reinstall the printer or update something to make it work. I buy laser printers so the ink doesn't dry out before I can use it. The whole thing is so damned frustrating. Also, bluntly, unless you're doing photo work, never buy an inkjet. They're cheap, and there's a reason they're cheap. Inkjet has better color representation, so photo printers should probably be inkjet, for everything else, do yourself a favor and buy a laser printer. Toner lasts much, much, longer.