Vitamins:

3x M3x20 bolt

1x M3x25 bolt

1x M4x60 bolt

4x M3 nut

1x M4 self-locking nut

2x M3 washer

6x 8x1x50mm steel tube

1x some compression spring about 10x50mm

1x wood screw M3x40

 

Instructions:

Print white parts from ABS and red and yellow parts from PLA.

Test it at your own risk...