Hi Marv
Thanks for the complement but there are much better artists lurking on this forum.

This is how I approached making it https://youtu.be/oIjFaWogIqs Its speeded up a bit but I think its followable. I can put up the original version if you would prefer. I think the shelling might be difficult to achieve but I suspect that there are others on this forum that know about printing out real objects and they may well help you out. I will continue to experiment but I work full time and have a family so I seldom get more than a few minutes at a streach.
Keith