I actually found this: C-Beam Axis with Metal Maslow Sled - #42 by Metalmaslow but I’m a bit confused on what to put on the z-axis tab during calibration as it doesn’t look like there is a spot for any of those numbers 
I actually found this: C-Beam Axis with Metal Maslow Sled - #42 by Metalmaslow but I’m a bit confused on what to put on the z-axis tab during calibration as it doesn’t look like there is a spot for any of those numbers