SILOS: Crop Circles Expansion

From BoardGameGeek:

This expansion features two new modules. The Crop Circles Module introduces another element of long-term strategy. The Permanent Skill Tiles Module features diverging asymmetry. You may decide to include one or both modules in your plays of SILOS, but we only recommend the Permanent Skill Tiles Module for experienced players Note: This mini-expansion increases the complexity and playing time of the game. -description from the draft rulebook preview