"Mike Rocket J. Squirrel Elliott" wrote:


> The old engine's rockers have a lot of fretting where the rocker bears against the rocker
> axle, so I don't want to use them.


Turn the axle shafts "upside down" to get the rocker to ride against a
smooth, non-worn side of it.
Note that you may need to drill the stud holes a little bigger (not all
the way through!) to allow room for the thicker base of ths stud. Study
the other end of the hole, you'll see a step cut.

Or just buy new shafts or whole assemblies and eliminate all your
problems

Jan