Y Endstop 10mm for Hephestos

Fits:
- Prusa i3 Hephestos
- Bases 10mm thick

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Remixed from [EjeY final carrera base](http://www.thingiverse.com/thing:371842):
- For 10mm thick bases, instead of the default 6mm

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Hardware needed:
- M3x25 screw
- M3 nut

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Note: if you are using a 10mm base, this is the only different "thing" you need.