Further trials and tribulations of the Isis quilt

This plinth is driving me to distraction. I got it pieced last night, and found that not only had it stretched quite a bit, but also that with the planned gold border it just didn't look right. I've tried out practically every fabric that could possibly work, and here's a short list of four. The border was originally intended to be 1/2" wide, though I could go down to 1/4". I'll probably have to resew the plinth to take off the blue chevrons at the end, as it's too long at the moment. I've folded the ends in to show this, with it now ending at the point of the last green chevrons. I've also drizzled some embroidery threads to represent the papyrus clumps that will be embroidered on either side of the plinth, as in the master drawing, and the blue stars that will be above the figure. There will of course be more stars than that, I just didn't have that many bits of loose blue thread. Remember that the dress will probably be embroidered and beaded in orange/pale copper, that the skin and dress will both be outlined in a darker colour, and that if the plinth needs more definition (I'm thinking particularly of the green here), that can easily be outlined or embroidered over (e.g. herringbone stitch).

( Photos and a poll )