OK, back to the land of the living for a few minutes. Celestron recommends using a parfocal eyepiece (they include a clamp ring for an eyepiece supplied by the user) to find and focus the guidestar. My thought was, instead of swapping-out the eyepiece for the autoguider, to use a flip mirror and be able to go back and forth instantly. It sounds like, once you know where the guider focuses, the eyepiece might not be necessary at all. This is where a micrometer focuser comes in handy. Also eliminating the flip mirror means you don't need a lot of extra in-travel between the focal plane and the fully racked-in focuser position. I still have my old Lumicon off-axis guider in a 2" format. That little item was worth it's weight in gold when imaging with film, although I have to tell you that guide stars near the edge of the FOV are pretty comatic with very fast f-ratio scopes. Using the Lumicon coma corrector helped reduce that condition tremendously (also used visually, I'm glad I have it). You're probably only getting about 50% illumination out near the edge, especially with a reflector, but that's still a lot more aperture than a 50mm or 80mm guide scope when used with say, an 8" objective. One of these days, clear dark skies will coincide with my free time and I'll actually get to try out the NexGuide.