The three supports are longer than the adjustment screws, but short enough in their positions so they don't interfere with telescope motion. Since a six-point mirror cell is easier to make than a nine, and because I was curious to try out the prediction, I made a six point mirror cell. The mounting hardware is the same as taught by Bruce Sayre . The beams pivot on stainless steel shoulder bolts. The mirror is then attached to the support pads using silicone caulk.
Adhesives are very good in shear.
What really makes this scope lightweight is the primary. It weighs approximately 12 lb. It s a very nice mirror made by Enterprise Optics and has a QSP enhanced coating. Here you can see the mirror attached to its cell before it is placed into the mirror box. A stainless steel spring is placed over each of the three support bolts before the assembly is placed into the mirror box.