There is a Murray Chris Craft forum on the Boat US web site. It has mostly died off, there hasn't been a post in almost a month but reading through the archives is very informative.
There is now a very active group on Facebook. Just search Murray Chris Craft and ask to join. There are 460, 500 and 501 owners there with lots of helpful input. You can get great answers to most things boating here at TF but the FB page will sure help you figure out what that widget thingy is supposed to do