No extra parts needed, which a...re can't make with 3D printer such as metallic springs, bolts and etc.
The parts are designed and tested to fit each other, however the tolerance is depends on a 3d-printer's condition.
Please remove the supports completely. May need a sandpaper or cutter while assemble the parts
3d model print parameters
Layer height:
0.18mm
Shell count: 3
Fill density:
15%~20%
Time to do: about 1900 - 2000 minutes
Technology: FDM
Material: PLA
...Dimensions: about 135mm x 155mm x 170mm
Material Quantity: about 300g
3D file format: STL
Publication date: 2021/03/29 at 07:25