I am using a 24 inch 3.50 mm circular from my ChiagoGoo interchangeable cord set so will be able to use a longer cord when needed. A 40 inch circular would have required knowledge and preference for the Magic Loop method. My cast on method of choice was the crochet cast on which offers a clear leg to pick up stitches for the first welt. Using A 2.75 dpn seems to be the easiest way to pick up a few stitches at a time when knitting live stitches and wrong side purl bumps together to form all subsequent welts. Inserting a lifeline through the first of eight knitted rows, immediately after each increase row, was a big help in identifying the purl bumps that were to be picked up and joined to the live edge to form each welt.
Being a visual learner, a schematic for the pattern would have been very helpful. Perhaps it would have prevented a false start. With the great help of Beth at the Tatamagouche Yarn & Company, Tatamagouche, Nova Scotia, Canada who is teaching a group class on Batad, I am now able to knit along happily without anymore trouble. The pattern is well written; but, as an intermediate skilled knitter, there was room for interpreting some instructions incorrectly at first.
I finished the final wedge with another welt, the tenth. I then chose to bind off with a three stitch icord, using a 4 mm needle. This gave me a very nice bottom edge on the garment.

Remainder yarn:
Wedge 1 g.
Welt 6 g.