I made a cushion for my footstool but when I glued the stool together it was not square. Since the stool was not square the plywood for the cushion wouldn’t fit as a square. To fix this I had to trace the plywood under my stool, and then I cut the plywood on the bandsaw. I cut a bit too much on the bandsaw so I sanded down the rest until the plywood fit with just enough space for my fabric.