Tony, what are your 4x5 image dimensions? The ones in front of me are close to 3.75" wide (which is the most narrow dimension), so I am curious how you are scanning your 4x5 in one pass since you are quoting 3.5" to start. Also, are you really getting a full 3.5 " image out of your scan or did you just measure the clear portion of the gap in the lid of the scanner to come up with that number? In my experience, between the scanner hardware limitations and software limitations, I have never seen people obtaining a full 3.5" from that scanner. Maybe something changed with a recent software release, so that is why I am asking. Don is right that we need some solid confirmation to make sure people won't be ordering these scanners just to find out they cannot scan 4x5 in one pass.
Doug