I needed an endstop holder that would clip to a 8mm rod and that would occupy as little space as possible, so as not to interfere with other moving components. This is what I came up with.

I print mine at 0.3mm layer height with 35% infill and 2 extra shells. They work out great.

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endstop, mendelmax, reprap, mechanicalendstop, endstopholder, simple