It is best to set up the bow and find the center then put an arrow on and measure from that center to the face of the shaft. Custom bows will be just that and vary some on center cut per the buyer's requirements for the bow. Some boyers keep that detailed of info and some don't. I have seen three different center cuts on three different MOABs I have had. Strike plate materials very in thickness. Even the BW bows with their CNC center cut have different strike plates. BW strike plates very a little with a couple different materials and some have the little bump under them making for up to 1/6" different thickness on two bows I had.