I learned that even if I cut the backer at the same time, I couldn't get the "frame" to match properly. If I cut it again, I would put the center pieces (unglued) in while the glue is setting for the frame. I learned that I really hate sanding!!! I learned that I am very unsure about how to shape items. Don't think that intarsia is in my future any time soon unless I take some lessons.