ANET A8 Limit switch and chain mount

This is a mashup of Starwhopper and flyingferret prints. I added the Z Endstop Adjuster and the linear chain to extruder together for convenience and improved accessibility. The linear chain mount was moved back to allow straight access to the screw that adjusts the Z height. Also, It was raised by 1/2" because it always seemed too low, compared to the extruder mounting position. And.. I gave it a little extra to match another mod that I have yet to upload.
The nut hole in the Z-endstop adjust