I Made this Quilter's Tailor ham as mentioned in another thread when discussing garment makers tailor's hams. I started a new thread because I thought others might not see it buried down in the answers.
I got the
Half Dowel Rod at the Lumber Store. I chose a
2 inch diameter rod and covered it with batting and heat resistant fabric that I use for hot pads. I made mine 60 inches long. I put my seams on it and iron on top of the curve to get a really flat seam like when you add a boarder to a quilt. Works great. It has been a real help to me. See picture below: