I burrowed into my assembly work all last week and got my Rainbow Dear Jane fully assembled Tuesday night!
I put in cornerstones on this one - went through all the colors I'd received for the blocks and found the one of each color that I liked best. Used that one for all the stones in each radiating color band. I think you can get the idea here:
Regarding earlier thoughts of quilting this in large sections, then joining them - SCRATCH THAT IDEA~! There are far too many precision points in small measure to match up to ever get it to line up perfectly after quilting. You'd have waves that will never block out completely, or mismatched lines. Besides the whole challenge of the serious thicknesses that fight with the foot as you're sewing.
As you're assembling your Babies, you'll find that tiny 1/2" sashing places many thick, thick seam-allowance stretches that ride so close to the foot that it's often difficult to keep the edges perfectly lined up. I found pinning like this to be super helpful, because on most blocks, that top Baby likes to slide away from the foot with a strong pull:
GO SLOW. And it also helped to provide support/tension from 3 angles: front and side with my left hand, from the back with my right hand reaching through the machine's throat (absent here to do camera duty):
P.S. - Men. . . ::shaking my head:: Mr. Caulkins: "This is what it would look like if a quilt farted:"