It really helps to have friends with amazing machinery.
In this case, it is my first time using a Maho milling machine.

I learned the basics and was able to use it to drill out the rivets for this worn rear wheel spline.

Although it could be done as an entire wheel, I de-laced the hub and it was much easier to handle. The hub will will get powder coated and new bearings, spokes and rim anyway.

Here is the ‘tool’ i used for the job:

Here are the various attachments. One was for making a center punch style hole, the other was to drill out the rivet.

About half way finished:

Done!

Here is an idea of the worn splines and what the rivets are like: