i3 Z motor mount w/ Y frame connection

This is an improved Z-motor mount I designed for my Sintron Prusa i3 acrylic to improve Z-axis rigidity. It takes the weight of the Z-motors off the frame, by directly supporting them. It also provides a more ridged connection between the XZ and Y frames.

For The right side mount just mirror the left.

I've also included a version with thin covers (0.5mm) over the motor and rod holes to support the overhangs. I haven't printed this one, but it should help with any droopy hole problems.