Aggas made his first foray into the universe of big-scope building in 1992 with the construction of a 20-inch f/4.
To minimize trips up and down, Aggas added features such as a motorized collimation control that allows him to fine-tune the alignment of the scope's optics while at the eyepiece.
It allows Aggas to stand atop the ladder and still interact with his laptop computer, which remains safely mounted down below.
On the azimuth axis Aggas added a Teflon doughnut around the central pivot bolt, and the altitude axis has sets of roller bearings.
Making a big mirror isn't a project for the faint of heart, and Aggas says that he's "never suffered from the insanity of grinding glass--only cutting, welding, drilling, tapping, sanding, staining, and so on.