Focuser Bracket William Optics FD80

Focuser bracket for William Optics FD80 telescope and NEMA 14 stepper motor
https://www.omc-stepperonline.com/nema-14-bipolar-09deg-11ncm-1558ozin-04a-10v-35x35x28mm-4-wires-14hm11-0404s.html
Based on myFocuserPro2 project.
https://sourceforge.net/projects/arduinoascomfocuserpro2diy/
Redesigned so holes do not need threading [7th July 2019]
Redesigned to enlarge nut holes slightly [8th July 2019]