This was an F8 Newtonian we built from scratch with "stone knives and bear skins" so to speak. Bought "How to Make a Telescope" by Jean Texereau, and supplies from University Optics. Built homemade Foucault tester to boot! We needed a little help in the final figuring, which we got at the Detroit Astronomical Society, which ran workshops on mirror grinding pretty often. This thing worked great, and I still have the mirror. Notice the Unitron finder on it, which I still have as well!