Originally Posted by ILLEGAL

pop your needle off, then glue it back on, it will be off 10mph right away. Then you dont need a fake calibration, you can get one for real, but you will need to buy a new speedo for $80, and have to pay a defective equipment ticket and court costs.

(when the needle is removed, the shaft it was on turns because there is no longer resistance, because the needle you just removed is not pressed up against the stopper anymore)