A real refusal, in four steps
Type 17.179. See the sheet say no.
This is the block from a Detroit Series 60 job. Its minimum finished deck height is 17.185 inches. Follow the reading from the gauge to the printed traveler, then use the same job in a sandbox that wipes itself clean nightly.
No email, password or card. Demo measurements do not survive the nightly reset.
Brockway Transport sample
Captioned walkthrough
What happens after the gauge comes down
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Record
Enter 17.179 for final deck height. The value is kept with the person, time and limit that judged it.
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Judge
The row says BELOW MIN against 17.1850. The warning uses words as well as colour.
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Refuse
Sign-off stays unavailable to a guest. A shop manager still cannot sign this job until every hard stop is settled.
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Print
The demo traveler prints with a DEMO watermark, so it cannot be mistaken for a customer's warranty record.
The sandbox boundary
Enough access to test the claim, and no more
A guest can open the sample job, record measurements and print a watermarked traveler. Guest sessions cannot sign off, authorise an override, create a job, or open staff, shop, billing and setup screens. The sample is rebuilt nightly, so one visitor never inherits another visitor's work.