Bently, I have been thinking all day long between interruptions at work about all the good advise I am receiving.
for the ring, I am leaning to cutting it from the veneered ply.
Flush trim the taper shape with the help of a template.

But now you gave me another idea
So you are saying once I affix that edge put the top and bottom faces next. Well That simple idea will solve one of my dilemmas. Genius.

Actually if I do that I can flush trim the edges against the body before I put the visible faces. No jig needed -:)

Edit: if I do that then the top and bottom face ugly edges would be visible (:-

I don’t think the bottom is flat. I think the mold is an arc. I figured some dimensions already.
I am going to start the form tomorrow; then I can start fooling around a little.

I have that view and another one with koa veneer. Several sites list few version of it. I gleamed the width, height and length from theses site. Assuming it’s an arc, I can calculate the radius and the length of the arc.
The length of the arc will give me me the length of the flat ply I will bend. Of course I need to account for the changing radius with each added layer. to make simple on my self I make each layer about 5 inches longer and just trim the "stair’ on the bend later.

I am just thinking out loud hopping someone will catch any mistake in my reasoning…

Thanks!

Abbas, Castro Valley, CA