SummaryThis is how I decided to mount and trigger the Y-axis endstop for my ThreeUp V2 Printer. The mount adds additional support to the body housing the Y-axis and 2nd Z-axis steppers. This is the first version of this, and I will likely be updating this in the near future. So far I've done several short prints with these in place and one 9-hour print with these in place, so I known they work. UPDATE 2/21/2016: Modified the bracket to snap to the metal rod, added additional supports, and made room for the soldered pins sticking out on the underside of the endstop's pcb. Modified the "trigger" to no longer need a screw. Print SettingsPrinter: ThreeUp v2Rafts: NoSupports: YesResolution: .15Infill: 100%Notes: Supports: set at 30-degrees. 1.75mm filament 196/194C 100% infill, but still finished the "trigger" in about 16 minutes and the bracket in about 1.5 hr. Post-PrintingHow I Designed ThisSoftware used to design this.DesignSpark Mechanical 2.0 - hobbyist freeware license.