Just picked this scope off of craigslist for my observatory today. I have always wanted a refractor scope with goto ability but I wanted it to be large aperture. This scope is 6 wonderful inches! Now if only the skies would clear up from smoke (forest fires) and monsoon clouds! It is HEAVY, about 75 plus pounds but stable. It has a little slop in the RA motion but not noticeable when using the Autostar 497. Believe me this beast is visually impressive...Now the test will come soon on the heavenly objects.