To machine the tailstock, I set it up in my CNC using a vise. I had to use a regular 3/4" straight router bit because I did not have enough Z axis travel to get anything longer to work. I had to be careful because the part stood higher than the bottom of the Z axis. I had just enough clearance to reach the far side of the part to cut it. I was pretty happy with the results.
Here I am boring out the tailstock. I didn't attach the tailstock to the carriage as described in the book. Instead, I just used the carriage to push the tailstock along the ways and when I was at the end of the cut, I pulled the carriage and tailstock back by hand. It worked fine.
After the tailstock was machined, I needed to make the temporary tailstock spindle. I had originally made the tool post as Gingery described. It didn't work very well. I whipped up an adjustable tool post holder from 3 pieces of 3/8" thick aluminum plate I had laying around. It's not adjustable up and down, but it sure beats what I had before. As a bonus, 3/8" bits also fit the holder. Here you can see the start of the 60 degree point that I'm putting on the spindle.
Gingery talks about purchasing a 60 degree center gauge from Sears. I don't think Sears has sold them in years. I was trying to figure where I could buy one when it dawned on me I HAVE A CNC! I whipped up a model in Sketchup and used my CNC plugin to make the gcode. I cut it out of some lexan I had laying around. I made one side at 60 degrees and the other side at 45 degrees (in case I needed it someday).