Testing was necessary to locate the focal plane. There was a couple inches of uncertainty in the exact position before mounting, and the design of the spider accommodated this with easy adjustments. The Spider and focuser assembly is made with steel plate, perforated angle and a foam core ABS pipe. The pipe has 3 baffles in it, while the focuser is a helical focuser that will be remotely operated. Can you imagine how this could be adjusted manually? One of the aspects of the telescope in its prior configuration required standing on a platform as high as 8 feet in the air. Despite being made for looking through the telescope, observing at that height above the patio floor always carried a slight risk with it. The reworked telescope will operate in camera mode only, with eyepieces used in the focuser on extremely rare occasions and then only for testing. Approximately 50% of the telescope's view would be blocked by the observer's body with the body heat also working to destroy the seeing.