WTD: 8x20 plans or measurements

[bvaughn4]

I have a decent Korona 8x10 view camera frame I'd like to convert to 8x20. Does anyone have any drawings for one you have built from scratch. Plan to use the front standard and rails as is, hoping just build the rear box and back. Will most likely purchase an 8x20 holder and then build the back to it.

Thanks in advance for any drawings, suggestions or tips.

If you have drawing to email, my address is bvaughn4 at knology.net.

Thanks!
Bill