Creality Ender 3 Y Axis Dual Linear Rail MGN12

I was looking for a much simpler design that didn't result in Z height loss using MGN12 rails on the Y Axis. I also wanted to use two MGN12 rails as having just one caused my bed to rattle left and right and wasn't stable enough for my liking (YMMV). I remixed the Drill Guide for my Ender 3 Y Axis Plate (newer, non pro version).

Thanks to [bobblejot](https://www.thingiverse.com/bobblejot/about) for the awesome, original design. Visit [bobblejots original design](https://www.thingiverse.com/th