Make a grist mill - PEM BB traditional.straw.gristmill

This is a badge bit (BB) that is part of the PEM curriculum.  Completing this BB is part of getting the Straw badge in Traditional Skills.

Everyone likes bread and circuses, but how do you turn wheat into flour?  Let's make a small grist mill!

 
 

Here's one way to do it:


Minimum requirements:
  - Make a homemade grinding mill for grain
  - Stone grinding surfaces
  - Making the grinding wheel(s) is another BB
  - This bb can only use materials that existed 200 years ago

Provide proof of the following as pictures or video (<2 min):
  - The parts you're starting with
  - Several views of the grist mill under construction
  - Short video showing it grinding a grain or pseudograin