An end barrier that may be retroactively attached to a test switch is shown. For solid and semisolid food applications, the method and related apparatus comprises a conveyor-based transport system in which antimicrobial additives are added to food packaging. The system may provide a reveal decay, where the user may be given an opportunity to complete an action such that the longer it takes to complete the action, the payout amount that is revealed decreases to zero. A brake mechanism 60 is used which applies a brake mechanically to the rotation of the driving shaft 31 when the driver 36 returns to its home position. The switch unit detects a position of the regulating member based on a state of the switches that detect the size-detection target portions.