If the card could not move freely back and forth, please go to the step five.
If the card could move freely back and forth with little to no resistance, tightening is required.
This is done by inserting the Hex (Unbraco) key into the socket screw in the core as illustrated above.
When inserted turn the Hex key, in very small steps of 5 degrees of a circle clockwise.
Then test the resistance of the card gap with the single card again as shown in the previous illustration.
Tightening needs to be done until a single card can no longer pass through the gap.
When this – not room for card in the gap – state is reached, loosen the socket screw minimally until a card once again can pass through the gap with limited resistance.
Then take card two and place it on top of card one – it should not be possible to move the second card into the gap. Please see this video on how to test with card two correct and not correct.