Good Evening All,

Now that I have figured what size secondary to order for my 14.5 inch Telekit project, my question is: How good of a secondary do i need. I realize this is a very subjective question. But I am interested in any input. Has anyone used a $75 secondary, replaced it with a $175 one, and noticed a difference? How about the difference between quartz and pyrex?

Thanks in advance for the input.
Dan