I hit a LQS and found a great medium blue batik for the stop borders I think I need.
I was close to right - when pressed out the center section measured 37 3/4 inches, not 37 15/16ths inches like I thought.
I like the idea that all the movement in the center is stopped by the blue strip and then the creams give a nice place for your eyes to rest but it's not completely quiet like a solid would be.
Definitely like the one above as compared to the one below.
The corner units will need a blue stop border of some kind too.
And I have yet to figure out the gap spaces. Hopefully, inspiration will hit as I stitch the center together. This quilt keeps getting bigger and bigger as I design as I go.
Hope you have a great stitching weekend!