i have been searching high and low for some excel spreadsheets to aid me in figuring a six inch mirror using Jean Texerau's book. I know my limits and know someone has built a excel spreadsheet out there. i do not want to re-invent the egg so to speak, i would also as if there are any other spreadsheets out there that would aid me in my endevors of building a refractor as well as telescopes of all kinds. i am also looking for information on building a Nasmyth i have read the thread on the 24" one here though excellent i am looking for more technical information. thanks in advance
doc
