Great work Fred. No truss? Ion-milled optics?
So what will be the imaging train configuration? Native is 2286mm F/9 - .82 arcsec/pixel with the ST8 (FOV 14x21 arcmin). You don’t want to change it too far from its native configuration i.e the spacing between the primary and secondary when you’re installing a focal reducer (assuming you will). I guess you can always 2x2 bin to give 1.65 arcsec/pixel which is perhaps more realistic.
http://www.rc-astro.com/resources/reducer.html
http://www.hiddenloft.com/notes/rc.htm