ANET A8 Corner bracket / surface mount

Corner mounting bracket for anet a8:

- allows mounting the frame to a rigid surface (e.g. 18mm plywood or similar surface) with common screws.
- forces the acrylic frame sections into alignment at 90° to the M8 rods during assembly for smoother Y axis travel.
- adds rigidity to the frame and pulls front of y axis down to prevent lifting during aggressive jerk.
- 6 used on the example here (rear and both sides of front box section).
- works with existing popular front and rear braces by ot