A pen holder that launches its contents multiple feet into the air!
Requires some hardware for assembly:
4x M3*6mm Bolts
1x M3*12mm Bolts
5x M3 Nut
1x 0.6*9.5*20mm spring
1x 0.8*9.5*50mm spring
The springs I got from a multi assortment on amazon, and same for the M3 hardware.
Printing Tips:
The author marked this model as their own original creation.