The master rod was made from a piece of aluminum 7075-T651 sawn from plate.
One master rod and ten slave rod blanks ready for squaring.
The main rod bearing was a purchased SAE660 bronze sleeve bearing p/n 6381K528 available from McMaster-Carr. It has the correct I.D., but the O.D. is larger and the length is a little long as well.
First step is to make a little 9/16″ expansion arbor to hold the bushing for machining. This was a scrap piece of aluminum tapped with a 1/8″ pipe thread and then split with a hacksaw while still chucked in the collet.