unless im misunderstanding, hes asking about upgrading from 10 to 11 using setup.exe from a usb, not runnin the os off it. which you are correct, would run like shit.
nope, not that i know of, no idea as ive never even heard of this. buy from a reputable shop thats been around for years, a service provider, or buy something older but new in box.
no, this case is great, for air cooling. what it was designed for. one side fits perfect, you could always get creative and find a way to bridge the corners on the other side...
redline was a go to for a while and i still only use a distilled water/af mix in my loops (10/90%), just like in aios.
this deal is pretty good, if your into "proper" cooling fluids.
you should take it to your local apple store geniuses, just to see their faces.
this guy might be able to or maybe point you in the right direction: https://www.fleischerelectronicsservice.com/, mac-o-rama also kinda sounds like they might know what they are doing or could point you in the right...
keep waiting then, it hasnt even been announced yet. use pro and you dont need an account, and you can disable most of it in setup. thinking it wont be there if/when 12 comes is funny...
also, are you talking the key or key cap? im assuming you meant the key itself as the caps are supposed to be changeable and take 3rd party ones that match the cross pattern.