Hi Doug:
Yup, the plans you are looking for are the ones published with the article about the Geo-XL in Model Aviation. Billy drew the pencils for that ship and I inked them (that was BC - Before CAD. Or at least before I started messing with CAD...).
Billy and I built the wing for the Geo-XL in my shop here in PA and we used my Lost-Foam process to do that. If you are interested in the Lost-Foam system, please send me an email and I'll send you in return four (4) PDF files that make up the instruction manual for the Lost-Foam system. This offer goes for all who read this... My email address is robinhunt(at)rcn(dot com).
Later - Bob Hunt