TEFAT(R) Prototype Series: Developed in Southern Gotland, TEFAT(R) prototypes are created through extensive research focused on material performance, aerodynamic consistency, and mold precision. Our technical department works closely with mold development to analyze plastic behavior, rim geometry, dome structure, flexibility, and overall flight characteristics. Tiny adjustments are reviewed with scientific precision. Humanity truly peaked when we started debating disc geometry like it was nuclear engineering. Unlike standard production discs, TEFAT(R) prototypes are released without official flight numbers during the initial testing phase. The four ratings remain blank until extensive field testing has been completed by the TEFAT(R) Team. Players with different throwing styles and power levels evaluate glide, turn, fade, torque resistance, and wind performance to establish realistic and reliable flight ratings based on actual results. TEFAT(R) Prototype Series. Engineered on Southern Gotland. Tested by throwers. Defined by flight.