With two layers of fabric added under the leather aventail support band, I'm unable to string my old red cord through the vervelles. A solid brass wire was used instead.
I started pinning the mail aventail to the padded aventail and discovered that my pattern was too long (the outer diameter was too great) at the NE, NW, SE, and SW points. I'll have to do some last minute creative trimming and sewing before proceeding.