Adjusting Jig Parts and Centerline Before Attaching to Final Board

It is important to have the centerline be the same on all the jig parts holding the frame. That way your wheels are centered with the frame itself. I have a small aluminum plug with a hole in the center which I then match up with the PVC jigs. I can then transfer that measurement physically between the BB and the jig holding the dropouts so everything is on center.