Ive got a red dot finder on my 10 inch Lightbridge and I love it!! It took me a while to work out how to get it aligned to the scope but once I had it sorted, I was very happy with it. Its much better than the finderscope on my old scope, a 6 inch Celestron Dob. I found the cross hairs were too hard to see in the dark. My red dot finder has a few different settings on it, a red cross, a bullseye and a single red dot. I like the red cross the best so far, although I haven't really tried the other settings as yet.

As one other poster mentioned, your red dot finder should slide on and off the scope. I think most scopes have removable finders on them.