Free 

Remix of the original R2 part inspired by the first revision of https://www.printables.com/model/247005 design with M3 heat set insert.
This model made from original step file for M3x5x4 heat set inserts.
.step and .stl - files are available in attachments.
UPD 22.11.2023 rev2: Fix the hole dimention for heat set insert. Now the holes diameter 4.7mm instead of 4.6mm












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