One of my first remixed Things for my Prusa i3. derived from 2 other "Things"
This end stop clips on the x axis smooth rods which are 8mm diameter
45mm center to center
holds micro switch which is 20mm x 6.5mm x 10mm
Slightly off centered holder in order to trigger switch when contact is made with extruder mounting, height adjusted to clear belts too.
remixed with sketchup and meshmix,1st time playing around with deisgn software so bearwith.
Download & print.
i used Repetier host and Sliz3r print time around 30mins