This cube is a tolerance test for your printer. This cube is 1in X1in X 1in. The hole in the middle is .5in X .5in X .5in. This will test the tolerance of your printer after you print this measure the cube and the hole that will show the tolerance of your printer. The tolerance will be helpful when designing pieces that fit together. if you don't account for the tolerance the pieces probably wont fit together. Print this at 5-10% or more if you are willing to waste plastic, but you don't need to have any more than 10% to test the tolerance. you don't need a raft because of the flat base to help adhesion to your bed. you don't need any supports as long as you have the hole facing up in order for no overhangs. After printing this don't sand the block because if you do that the test would be pointless because you wouldn't be able to tell the precise tolerance. After printing just measure the cube on all sides and see how much excess there is. This was obviously a very simple design and was created in minutes in Fusion 360.