but the lip on the edge of most flatbed scanners keeps the document from touching the platen properly. [Matthew] decided to hack his Canon LiDE 90 scanner to use it in a face-down format.

“Canon's MegaTank Pixma G4280 is an affordable inkjet tank ... There are options to reduce, enlarge, and copy multiple pages ...

High end "personal", (very) inexpensive "professional" film scanner, 4000 dpi resolution (65 meg file from 35mm negative!), 14 bits per channel, dual USB & SCSI interface. Canon's compact flatbed ...