I have an Epson V600 which does a great job scanning 35 and 120, but is not made to scan 4x5. The backlight window is not wide enough. Some people get around this by doing overlapping partial scans and then stitching which is a fine solution. I was wondering if anyone had tried setting up their own backlight and then scanning from the flatbed (like scanning a document). I was thinking that an array of LEDs behind a piece of ground glass or other diffusing material would work. This would get the scan all in one go and eliminate the alignment and stitching steps. Has it been done?

Thanks,
J--