I played with the big boys for awhile but absolutely detested the ladder. This is my current dob, a 12" f/5. The primary, secondary, mirror cell and focuser are from an Apertura 12AD. Wasn't real thrilled with the tube and weight so I built this structure. New one weighs around 30lbs less and is easily moved around. Stows nicely in the car. The GSO optics were tested and it turned out they were quite good so I used them as is.3-Strut_In-Park_PUBLISH.JPG