What is the interference lock offset of a LEGO stud/hole such that it fits snugly into another piece? (i.e. What are the snap mechanism dimensions?) - Quora
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LEGO® Technic review: 42145 Airbus H175 Rescue Helicopter | New Elementary: LEGO® parts, sets and techniques
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LEGO pin and axle standard - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums