RepRap Prusa i3 bed auto-level UP1

thingiverse

At Thingiverse, you can find an optical version of this 3D printable part which features couplings for enhanced stability. The fixed version is secured with M3 M5 screws. Compatibility is a major advantage as it works well with Wade J-Head extrusion head module (though E3D is relatively high, making the original members more suitable for E3D; however, the coupling between Wade J-Head extrusion head module and this part is quite limited).