2x3x4 Twisty Puzzle

This is a 2x3x4 a Rubik´s type puzzle in a cuboid shape,so it also shapeshifts.
In order to make your own,you must print the amount of each piece as it name says,al the pieces are named "nameofthepiece_xQuantity.stl" and also a M3 screw(it needs to be small,about 0.5cm long) and a spring.
To assemble it,you need yo fit the "2x3x4 A" into the "2x2x3 A" pieces and same with the "B" pieces,3 of the "middle" pieces are held into the "2x2x1" pieces and the last one in the "core",once you have partl