For a long time i have planned building my own scope, I did a small 150mm Newtonian when I was 14..even ground the mirror, but I have wanted to make a BIGGIE for years, but life always got in the way. As I am making a concerted effort to get back into observational astronomy, and my kids are certainly interested, as is the better half, I have made the decision to plan and build a 20" or 500mm monster...that was the easy part of the decision.. I have used many scopes over the years and always fou