Oh, now that I didn't realize that - the board, engine, and accessories was sold as one unit! Gee, makes me wonder if that saw that sold on eBay was also part of a "workshop set" - if so, what a shame it was broken apart.
I suppose hardly anyone knows as the book I have from Donald Stilson doesn't mention it. Heck, I think a standalone thread (and video) on the Empire "workshop set" would be a good one to have here - so Googler's could perhaps stumble on it. hint, hint, hint ;-)
thanks for that information Nick!