Flint Millstones

This mod adds a Flint Millstone to VS for stone-age querning. It is used by making a 1x3 vertical "sandwich" in the crafting grid of the form millstone on top, ingredient in middle, millstone below.

With two flint millstones, you can grind anything a quern can, but at a fixed ratio of two input items for only one output powder (to encourage future migration to a quern for greater efficiency).

Want to get into leather-making in the stone age? Now you can! Want to salt your meat in the stone age? You can do that too! Go grind two rocks together.