So far Charlie has received the same response to his multi-axis threads that I got from my posts re sphericons a couple of years ago; namely, what the little boy shot at. I had looked forward to more responses to Charlie's enthusiastic threads, but then I didn't respond either. Sorry to bore y'all, but I'm gone try again with sphericons. I heard those groans!
For rcw types, David Springett's articles in "Woodturning" no's. 135 and 136 in which he detailed his development of sphericons into his turned wood "streptohedrons" is a good starting place. I know more about streptococci than streptohedrons, but he tells me that he hasn't published further articles re these geometric oddities, but will have a section in his forthcoming book. Till then and to get everyone still awake up to speed, you might want to google "sphericons" or go to:
Turn to Safety, Arch Fortiter