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I find even the most faintest of DSO's with my 9x50 finderscope (i have the same scope as you). Whats the trick to using any finderscope well?... Using both eyes.! its weird to get used to but once you get your head around it finding things will just happen. i was lucky as a child my old man taught me how to shoot guns with 2 eyes open. Same principle, one eye on the target and one eye on the field. the illuminated cross hairs arnt much use anyhow as even at a low brightness it will drown out any faint stars. Also using this method is exactly like using a Telerad, as your brain can combine the images from each eye and tell you when they are overlaying. and the eye with the finderscope can see what it is you want to point at (unless its too faint).
Using a star map and a suitable circle (thats the hard bit getting what your finderscope sees) which represents your FOV (SW finders are i belive 5 deg) then look for star patterns and match them to your FOV, i ran a Messier marathon like this even when my goto went on the blink i still found majority of them untill the clouds came over.!
Good luck with what ever you choose.
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