You should be able to find anything you need to know about the 10/22 in one of the 10/22 forums at RFC, use the search feature, they also have a Scopes, rings and mounts forum down the page. /ubbthreads/images/graemlins/grinning-smiley-003.gif
I'd take a hard look at the Power Custom base, it's one of the most recommended bases for the 10/22. There's also the imfamous 10/22 hump that causes major headaches for those unaware of it. /ubbthreads/images/graemlins/smiliesmack.gif