Tom,
A quick thank you as I have it all up and running now on my standard EQ5 mount.
I am using NEMA 14 stepper Motors
Pulleys 15 & 60 teeth from belting online with the appropriate belts.
Home made brackets.
After lots of bad weather finally had the opportunity to use the setup last Sunday (Dec 20, 2015).
After calibration of the AstroEQ box to ensure it was tracking at the correct speed, I managed to do a quick session on M42. Even a 120 sec exposure just using the AstroEQ box with no additional guiding (not using the ST4 port) resulted in pin sharp images.
See here the processed image:
http://www.astrobin.com/233475/Once again thank you.
BTW. If anybody would like my config file used by my AstroEQ for the setup above, please let me know. More than happy to share.
Raoul.