found a little box for it to rest in, so it doesn't get dusty in the shop.
checked it against some spacer blocks i have (1/8, 1/4, 3/8, and 1/2, as well as a 1-2-3 block), and it's right on.
the display might be off by 1/2 a thou, but that will work for what i'm doing. not sure how to re-zero it, if i need a tool, i don't have it.