20 December, 1978:
Continuing the Modular Buildings, I decided to mash together a Watermill, which features a Gristmill for grinding flour. Originally I wanted to do a full river with inboard region where the water was directed into the feeding trough, but decided it was a feature I didn't need for this particular model.
An overview of the completed Gristmill with flowing water:
Look inside with gears and mechanism: