Posted By Bob Chester
A 'perfect' parabola is impossible to grind. A really, really good one is quite doable. In an 8" mirror a parabola is the only way to go. Patience (which you say you have) is probably the most important ingredient needed.
Look for Jean Texereau's book 'How to Make a Telescope' or others that are available and don't be intimidated. Dive on in. Great joy and pride can be derived from viewing through a scope you know you made.
[COLOR="Red"]Caution!! [/COLOR] Amateur Telescope Making is addictive.