QU-BD Z Endstop - Left Gantry Mod

Small update to Tony_921's great x gantry replacement. Adjusted the holes on the left side pieces to allow easy mounting of a Z -axis endstop on the bottom. If needed you can add a screw to the bottom chassis to act as an adjuster for setting the Z home. I ended up not needing an adjuster. Printed in ABS at 0.2mm and 20% infill.

Update 4/21: Added a Z Endstop Adjuster for those who need it. It has M3 holes to attach it under where the Z Endstop is located. I use it without an added screw on t