What advice would you give someone starting this project? Made the 39" size. Used polyester batting between layers of the base. For the sides, I used SF101 fusible interfacing 7" wide, and cut the fabric for the sides 7-1/2"wide (folds in half to make sides about 3" high). Added extra strips of SF101 in the areas around the grommets. Found that with this large size, it was kind of difficult to cinch into a nice round shape, so I added 2 more sets of grommets to cinch the bag from 4 places, and it worked great! I used 3/16" polyester cord, and 3/8" grommets.