I do have a couple of the process.
So we put a Jacobs chuck in the headstock with and turn by center adapter, then the bushing for the kit that corresponded with the (center end of the body) and then used the 60 degree to steady the body while turning. I don't have a pic, but you'll see it's pretty much the same set up for the cap, except for with the cap we installed the mandrel saver on the tail stock.
Here's a pic of the cap, the only difference here is the mandrel saver, for the body we used the 60 degree. I say we here, because this whole Macgyvering scenario took two heads not one.
For sanding the set up is the Jacobs chuck goes into the headstock, a corresponding punch (27/64) went into the Jacobs chuck to make a mandrel, painters tape went onto the punch to help the barrel hold (like a jamb chuck.) We did have a small issue at the beginning trying to sand the body, when we first put the body on the punch it wanted to back off a bit due to the air trapped within the body and the punch, but we put tape to form a crude jamb chuck basically and it held for us to sand.