So I started with a 5/16" hardwood dowel, 4 feet in length. It measured a little more than 8 mm in diameter. The dowels are color coded; 5/16" dowel has yellow color on one end face. I rolled several on the floor to find the straightest. I printed out page 1 on common 20 lb office paper, xerographic paper, because the wraps on page 1 seemed too thick in cardstock. I tried, and failed, to properly mark a straight pencil line on the dowel to guide the placement of the wraps. I applied the wrap as best I could, but you can see a little lateral wandering of the seam line. I made a little jig to hold the stick up to protect modules as they are added.