Thanks for the links - they are very helpful especially the great photos from Gus. I notice in one that there is a balsa sheet for the parts to be popped out, so apparently dad did get that far, since there are pieces and no sheet. The ones in the other photos appear to be in pretty good shape - while mine is nice, it shows its age and I'll need to study the pictures and inventory the original parts and compare to the direction sheet. My concern with ebay is that I'd likely have to separate the original box of motors to list it not to mention the challenge of shipping this item. (Unless they let me include but for pickup in our central fl area only.) I agree an auction would be preferable but still trying to figure out what I have and interest. It deserves more than bubble wrapped in a closet - your links will help with the research.