CarPen

Firstly print 3x TESTER.stl! According to joint strength pen refill and TESTER choose 3_4mm.zip or 3_3mm.zip.

https://youtu.be/_TDEIswQ_RA

3D print BOM:

4x 2.stl
8x 1.stl
4x 3.stl
8x 4.stl
8x 5.stl
4x 6.stl
4x 7.stl
8x 10.stl
4x 11.stl
1x ram.stl
1x 13.stl
1x 14.stl
1x 13_MIR.stl
1x 15.stl
1x 15_MIR.stl
1x 17.stl
1x 18.stl
2x kostka1.stl
2x kostkamezi.stl
2x kostka2.stl
1x 20.stl
2x light_back.stl
2x light_front.stl
1x 16.stl
1x 18_MIR.stl
2x Wheel_R.stl -TPU
2x Wheel_L.stl -TPU

2x Wheel_L_merge.stl - If you haven´t TPU (flexy)
2x Wheel_R_merge.stl - If you haven´t TPU (flexy)

Pen refill:

2x 50mm
3x 47mm
24x 40mm
4x 35mm
8x 30mm

...and 8 springs from pen