Do you have to recalibrate after changing the blade?

Maintenance & Repair
Accuracy

The reasonable worry about a replaceable blade is that a swap turns an accurate tool into an approximate one. On the T1 Tomahawk the measurement comes from a pattern printed on the blade and read by a sensor in the case, so a new blade brings its own reference with it. The tool self-calibrates on the fresh pattern instead of needing a bench standard and an adjustment. A five-minute repair with a screwdriver, and the readings are the readings again.

What happens after a blade swap

Scale is printed on the blade itself
T1 self-calibrates on the new pattern
No bench standard after a swap
Five-minute repair with a screwdriver
T1 readings return unchanged

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The video opens a boxed T1 Tomahawk replacement blade, fits it, and then takes measurements of 13 and 20 off a straightedge on a bench. There is no calibration step in the middle. The point being made is that the blade carries the scale, so replacing it is a repair rather than a recalibration.