Great idea with adapting the socket as a holder. I use regular shellholders and a Craftsman cordless drill. I would have some concerns about turning too fast with the drill you are using. I turn mine in dim light using MAP gas, until the neck just barely begins to show some orange, (about 6 seconds) then drop it dry in a pan. I used to quench them in water, but I stopped doing that when someone said the factories do not quench them.
Recently bought a bottle of Tempilaq 650. Wiped a streak on the necks, but it disappeared immediately. On another forum someone said wipe the Tempilaq just below the shoulder; I need to try that. I always size mine again after they are annealed.