I think it's an absolute must on a dob. Seriously I wasted so much time with a finderscope for over 2 years. The finderscope is great for finding those fuzzies, only ONCE you've actually found your guidestar via the Telrad, which unfortunately with the finderscope is almost an impossibility.
Make sure you grab a telrad heater though as well, as it won't last long on those dewwy nights. I have one brand new which I'm contemplating selling (never used). If your interested PM me
