Here's my completed Ipad case. I used three layers of glued-together coroplast for the frame. I thought the coroplast looked ugly so I wrapped the pieces in vinyl. I used coroplast inserts for the cover and twill tape for the edging. Finally I glued the frame to the inside cover. I have a few new ideas for the next one. I might add a velcro closure to this one.The loop in the spine is for my homemade Ipad stylus.
I realized I had covered up the speakers and other ports when I got a Skype call and we couldn't hear anything. So I'm going to try a design where I keep the various ports exposed.