From PsyHelp

• Is a custom Add-on.

How to get it

• "Study" Windmill Blueprint

Uses

• Efficiently saws a Log into 4 Wood
• Efficiently mills Wheat into Flour
  • Every 2 Wheat yields three Flour (if you mill an odd number, the last Wheat will only yield one Flour).
• Grants user the following profile background choice:

Notes

• It is almost impossible to obtain this item as it can no longer be obtained from the game.