Mini Lead Screw Bracket

This remix serves two purposes:

1) It allows moving the two Z-axis lead screws slightly closer.*
2) It requires less material to print while still being sufficiently strong.

* I am driving both lead screws with a single stepper motor. They are connected with a 900mm GT2 belt and two 60-tooth pulleys. Moving the lead screws closer was necessary in this set-up for proper belt tension.