Once you get in the groove you’ll love the consistency you get with the mill. I set up my own DRO system using 3 different slide micrometers for XYZ axis. But even after I found the best vise location for both limbs and riser, and got the jaws running dead straight, and zeroed out… I figured out it’s always best to zero out the Y axis every time I reset the pieces in the vise…. It’s kind of a learning curve hitting dead center every time…. Rather than using a center finder, I use my 1/4” mill or router bit and bring it right up to the edge, then zero it out then use the total width divided x 2 plus. .125 for center.
I also learned never to flip a riser end to end when milling. Mill one end, then slide it down to the other….
Of course you don’t have that luxury with limbs, but those come out pretty good if they are both the same width going into the mill, and zero out true center. Its nice being able to elongate the lower pin hole about .020-.040 and over sized the bole hole. Those limbs mount first time, every time and rarely need any bolt hole filing.
Great tools… but there is a learning curve. Kirk