This part attaches a Raspberry Pi in a slightly stupid case I have to an external hard disk. There wasn’t really a way to print it without at least some kind of support material…except leaning back at a 45 degree angle. This printed entirely without supports.
It’s kind of normal. Printing on a glass is normal, some people pick a mirror because it conducts heat slightly better.
No they don’t, they pick mirrors because they’re guaranteed to be flat at a low price.