Kraken

To make a groove in a pin chuck the pin in a drill motor. Use a small file to cut the groove. If the groove is wide use a 1/16 cut off wheel in an angle grinder to cut the groove. We did a lot of similar stuff on construction jobs but didn't have a lathe. There are a lot of ways to skin a cat. Use what you have.

That's a great tip, I'm going to give making a set of pins a try.

Site is working. The search function on the DNR site is practically useless, rarely brings back relevant links.