I like CC1, but going back to the original post I agree with peter. I think the navigation for the others systems needs to be more obvious in some way. I did not 'intuit' that there are other options where to look for information on them. Moving the links to the top and making them stand out (in a non-flashy way) might help.
jr

"What can be asserted without evidence can also be dismissed without evidence." C Hitchens