I just bought some used Flip covers, but while I was waiting for them to come, I thought I would try to make a cover like that, but with my beloved leg gussets. I cut out my favorite sized pattern, figured out how much of the top and bottom I wanted to cut and cut two 1 1/2" strips (on the stretch) for binding the leg openings. I sewed the binding and the leg gusset with right sides together onto the leg opening. Then I tacked the elastic to the leg opening top and bottom, turned the binding to the inside, turned in the raw edge, pulled the elastic back into the seam edge and stitched down the binding. Then I turned and topstitched the open edge of the upper and lower inside pieces. With right sides together I stitched the top and bottom inner pocket onto the diaper outer, added the elastic to the front and back, turned right side out and topstitched the diaper. Of course, I had added the front snaps before I stitched it on and added the hip snaps when finished. I added a single snap to the center of the back because I use snap in inserts in my diapers. I'm excited to use this one.