So. how many what types of shapes for pin heads should I make, to
recreate a complete set?
One, Andrew. Get some rod, cut four pieces to length and get to
work. Grooving the heads is useful but not absolutely necessary. It
should take around ten minutes or so. The set of attachments are
those that are commonly used by various people at various times. You
may never need some of them. When you need another shape, you'll
know it and you can make it then. It's about engraving, you see.