When I purchased this partially complete fuselage, I didn't know exactly what the fuselage was made of or the construction technique. The seller said it was made of a mahogany, balsa, mahogany sandwich. I looked through the previous owner's notes and found a couple of references to aero-core. After a lot of searching I found an article in Contact magazine. This article was published in the March-April 1994 issue of Contact. It describes my fuselage construction perfectly. Patrick Panzera, editor of Contact magazine, graciously allowed me to copy it and publish it here. This is a scan of a reprint of a back issue so the pictures aren't all that great, but I can see enough to know how my fuselage was built and probably by whom. I can't find any recent reference to Aero-Core, so I would be willing to bet that there was a balsa shortage that put them out of business. If anyone knows of any current product like aero-core, please let me know and I will show it here.