A tuner takes an existing calibration — usually a purchased file — and applies it to a car. The ceiling is real: you’re dependent on someone else’s calibration.
A calibrator builds calibration. They can look at a file they’ve never seen before and understand what it’s doing and why.
A tuner charges €50–300. A calibrator charges €300–2,000+.
The gap — between pattern-following and actual understanding — is exactly what the courses here address.
The gap — between pattern-following and actual understanding — is exactly what Diesel Fundamental addresses. It builds the calibration thinking that separates a technician from a calibrator.