Les Elm would be a great source for this subject, hopefully, he'll see this posting and post a tutorial on it. If possible, he would be my go to guy for any of the types of turnings we pen turner's turn. But with him being so busy keeping his stock built up, he doesn't have any spare time. He does what he can to help, but I'd love to be a fly on his wall to watch how he does things.
Len