Chances are... now you have the 5x7 back and the Ansco back as examples so why not make an 8x10 back if you have the basic tools. The hardest parts are the springs but you have until the end of the building of the back to find a pair. They might be a little easier to find than a complete back. Whatever you decide good luck with the camera, I have two, an 8x10 and a 5x7 Kodak 2D. I have the extension for the 5x7 but never found one for the 8x10. I actually like the solid feel of my 5x7.