Two Stage Switchblade Prototype

A switchblade knife with a two-stage blade that roughly doubles in length when extended
This is a work in progress and is not totally reliable!!
Required Parts

4x Neodymium cylinder magnets, 5mm diameter and 3mm height
2x M4x20mm screws
1x M3x14mm or M3x12mm screw and washer
1x M2x6mm screw
Medium / Large rubber band


Assembly
Insert two of the magnets into the holes in the ring on LowerBlade. Make the magnets orientation opposite eachother.
Do the same for the holes in UpperBlade and ensure that the magnets on LowerBlade will attract the magnets on UpperBlade when they are locked in the open position
With the blade facing away from you and the tip pointed up, screw the M2x6mm screw into the left side of the UpperBlade's small hole. This acts as a stop pin when the blade opens
Connect the blade halves via the post in LowerBlade and set them to the open position with the magnets holding them together. Place the M3 washer around the M3 screw and screw it into the post