The embedded image seems to be a different size every time I load it. In case you can't see, my digital micrometer measures the size of this T-slot, which is 1 inch wide in the CAD file, as 1.0000 inches! If I measure it all up and down the length it might be a mil or two off but that's awesome precision. Material is ABS, printed at 240C nozzle temp and 110C bed temp in enclosure.

Here's the reddit thread in case anybody wants to give a shoutout for this amazing MakerGear performance.https://www.reddit.com/r/functionalprint/comments/6bdky6/just_a_piece_of_1_inch_tslot_to_prototype_some/