
Diff Gearbox 3.5mm Bottom Holes
thingiverse
Just like the original Diff Gearbox but the holes have been reduced from 4mm diameter to 3.5mm so that the M4 bolts will actually have a strong bite. The other 7 holes designed for M3 bolts have been reduced to 2.5mm as well. Originally the M4 holes were set to 4mm which left almost nothing to bite, and 4x of the M3 holes were set to 3mm and 3x were set to 2.9mm. 2.5mm holes for M3 bolts should make a much stronger hold, you may need to tap the holes, I will be.
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