Championship ring shank question

Hello all,
Me again :wink:

Can somebody explain me how I should proceed to build a shank like in this LA lakers championship ring?
I have no clue where to start.
I was able to make the ring myself from my own ideas but have no clue how to work to make the shank for the LA Lakers one. My technique I used to build the ring only seem to work when the center point is round or oval.

Many thanks in advance.

Hi Pieter - try a web search on "Rhino ring shankโ€™ - there is quite a bit out there (and this thread as well!) that should get you started.