Hi!
While discussing with Peter in the tetrahelix thread I brought out my photos of the heptagonal crown I made some time ago.
I might as well share them here.
My first version, based on the 2-flying-saucers-crash shape (EDIT: it's called an Oloid) looked like this (with a horrible choice of colors because I had scraped the bottom of the drawer in search of the last rods I had left):
As I was looking for a stripped down version I decided to remove a few rods from the outer edge and and I got this rather stylish version: