If you ask GPA for the Dowel locating pins, they may be able to send some. They did not come with my GPA frams as they are supposed to be with the driver. Apparently, they tend to stick in the fram surround and get thrown away at change out time. That most have happened to mine before I got the drivers.

Although it's supposed to be easy to align by ear, I had a devil of a time with it. Sure wish I had the dowels. Maybe you have more finesse than I and will have no trouble.