Monster Truck

I made a Monster Truck model. Spring as additional components are required. Spring specification (Diameter:4mm-5mm, length：≈20mm）Hope you love it. Have fun doing. Assembly and Printing Instructions (Diameter:4mm-5mm, length：≈20mm）I use the spring of the push-button ballpoint pen. (Diameter:4mm-5mm, length：≈20mm Not less than 20 millimeters）I use the spring of the push-button ballpoint pen. This model was printed using PLA. (fill in 10%，using a lower layer high (0.2mm)