I only mention this because you have your rings dry fit and looks like you are trying to glue them all at once.
Julian Roslanowski wrote on Apr 25^th, 2016 at 9:29am:


If you're thinking about trying to glue up the entire ring at once, my advice would be to get over it.
Adding the glue will simply add a level  of difficulty to an already difficult task.
The way your segments are cut, the lighter color segments will most likely butt together at the tips and therefore no clamping pressure will be applied to the darker colored segments unless it's in some type of press.

Julian Roslanowski wrote on Apr 25^th, 2016 at 9:29am:

Yet another level of difficulty to an already complex glue up.
If you can't glue in one sitting,( see above ) you will need to glue up small sub-assemblies (16 pairs with the veneer sandwiched in between) then 8 pairs and so on.
If the two rings are not glued evenly or equally, after sanding (flattening) it's unlikely that the darker wood segments will align properly and create the diamond effect you're looking for. Both rings must be treated identically. so that the surfaces to be glued together are the same.

Bob, definitely will need to put the ring between 2 flat boards to keep the triangles from rising up.  But for this ring I decided to put some veneer in between the triangular pieces.  With the veneer I'll have to glue up the pieces in sections.

I glued up 2 of the rings with triangles.  One ring has pieces of veneer; this ring I glued up a few pieces at a time.  The other ring was glued up with a hose clamp and some waxed plywood scraps.  This worked well and much quicker than gluing a few pieces at a time.