A small update. Thanks to some very special help I've been able to fix my scanner. The problem wasn't an issue with the scan/optics array after all; the scanner uses a strip of white material to calibrate against during POST. On my unit this strip had been damaged somehow. A bit of white photo paper and double-sided tape and now it works like a champ! I'll be redoing the scan of ZoE next and picking up with the Macross books from Boinger in January.
See you soon!