re: Drill Indexing jig for small parts.

Very handy!

One nice feature of any laser is accurate placement of marks for later use. I'll often use one to place starter dimples on a project so the bit has a place to register before drilling (like my cribbage boards). Small bits will always bend away slightly from a simple pencil mark in favor of a softer wood grain. The actual dimple gives it a pre-bite hole for accuracy.
A nice and pointy nail set also works, but then you need a good eyeball to get that aligned.