Why is this topic offered in an aircraft catalog? "What would anybody ever need to cast on an aircraft?" But then over the next few hours, a wide array of castable items started coming to mind: control stops, levers, handles, various engine parts, ornaments for the restorer, many types of internal brackets, edge strips, bucking bars and other tools, etc.
So here it is, an inexpensive book on a little known topic that some will find incredibly useful, saving big money on some things, and saving endless hours scrounging for difficult and impossible to find parts. Besides, it might even be fun. Who knows what you'll come up with someday when there is nothing else to do.