JIG ZERO

Before the first rivet is fired, the frame must know its limits.

This is not a blueprint. This is the tolerance stack-up.

Material: 6061-T6 aluminum. Stress point: ±0.001mm at the crown. History: The '65 Mustang transmission case—where the weld cracked because the heat spread wrong.

We do not forgive the drift. We build the cradle that refuses it.