In order to take some of the measuring out of coring, I have these tips. First, attach the chuck and jaws that you would normally use for coring. Using a square, mark the point at which the front of the jaws meet at the bed. This is 0. I then attached a 12" tape to the bed to make setup of the jig easier and more predictable each time. (On my Oneways ways, I had to slightly grind down the welds so that the tape would lay flat. I then sanded enough paint off so that the tape would stick.) For each knife (and support finger), I clearly marked the # on the side and what size bowls it is capable of. Also (although harder to see) I marked the distance from the center of the knife tip to the center of the post where is goes into the base plate. Now when laying out the plates and knifes, I don't have to look up the diameters and depths, they are right at my fingertips and the tape assists me in laying out the cuts more easily.