AOE and Shimeado correction

• AOE is the abbreviation for Angle of Engagement, which means contact angle, that is, how the first tooth of the piston meshes with the first tooth of the sector gear.
• Shimming is an English word that means putting shims on the shafts of gears to maintain their correct position.

Gear teeth must be in such a way that they maintain a constant point of contact, and do not slide over one another. This allows for less load on the motor, reduced noise, longer internal life, and improved overall performance.