It's easy as long as.....
KurtK in Indy
>you have a vacuum chuck system. I rounded the blank and then put a lip (if you will) on the lid portion that would be below the spikes and have a solid rim. I then made a vacuum chuck that was deep enough to allow the spike to sit inside the chuck and not touch the seat of it. Turned the inside of the lid careful to mark where the finished diameter of the box would be. When I finished the inside, I popped the lid back on the overall box and turned the lip away to the same diameter of the the box. I used my pointed center on the tailstock and put a piece of neoprene on it to protect the spike. Just dumb luck the the point fell right in the hollow of a couple spikes. I didn't tighten the tailstock very much...just enough to keep it snug and allow for the lid not to slip as I cut.
The execution was pretty simple...it was figuring out that I neede a pretty deep chuck (several attempts that yielded not deep enough).
Without a vacuum chuck system...well...it is monday and my brain doesn't want to work too hard on that yet.
Good luck,
Kurt