Step 1: Make the Regular Stiletto
Step 2: Add Supports
Pic 2:Make these (they are two orange connectors with green rods on one end)
Pic 3: Attach pic 2 to pic 1.
Pic 4: attach pic 3 to the knife.
Step 3: New Locking Mech
Pic 2: Attach the Y-connectors to the knife (You should replace the white rods that were there with blue rods.)
Pic 3: Add the orange connector.
Pic 4: Attach the rubber band on the side that does not have the orange connector.
Step 4: Locking and "Firing"
To fire press down on the white rod until the blade shoots out, (see pics 2, 3, and 4).