Here is my EdgeHD 9.25 and Losmandy G11/Gemini waiting for a workout. I acquired Celestron's
EdgeHD 9.25 late 2010 and the Losmandy mount in mid 2008. At my home I image from the
second story deck. The deck has 6 inch by 6 inch support columns with joists 12 inches
on center. Its pretty sturdy but at long focal lengths (2350mm) there is still some
movement visible through the telescope. At shorter focal lengths it's not much of an issue.