Dial indicator on 12x8 mm square rail
thingiverse
This is a dial indicator holder mounted on a 12mm x 8mm square rail. The bolt holes on the block measure 20x20 mm and M3x10mm bolts are used. I utilized this to modify my FT-5 for a CoreXY conversion. A downloadable bolt with a 3D-printed knob is available at https://www.thingiverse.com/thing:2853001, while an installation video can be found at 1:30 of https://youtu.be/XDcGbSpI4e8.
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