not to be picky but agree with deadeye subdued is elegant.

You guys are giving me too much credit.  Cut my teeth in a Job Shop where the rule of thumb was "Quick and Dirty"
General Set Up: Close to the Chuck as possible.  Back Gear which gives me about 35 rpm.  Tool Bits just a Blond Hair above center.  Feed in by hand slowly, let it cut freely.  Tool Bits were roughed out and then finished with Mounted Stones in a Dremel.  Pointy Bit was used to break the 90° edge at the Octagon.  Bits were held in an "Armstrong" holder as that made adjustment easy.  I like the idea of Sperate Bits as I can make changes to sizes easy. Oh, one last thing, I did a test run on a Barrel Stub first.😉

Mine are made by EDM also....
Elderly Disgruntled Machinist 
More power to you 👍🏻 David