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Print in PLA or better.
The screw should be printed horizontally as in file for better strength, and a layer height around 0.1 is adviced for better threads. Support is needed, and support roof is adviced.
Other parts prints fine without support, if orientation from files is used.
For assambly you'll need:
2 pcs m4x20 button head screws. (shorter will work as well)
3 pcs m4x20 countersunk screws.
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