What I've observed that couple of posters contacted me offline (PM) and in order to provide them with Manuals I've provided the link to other site (ibmmainframes.com) and then they registered themselves there to get banned later.
Personally, I'd say, it'd be nice if we keep these two site just separate - we might refer once in a while...
It took me days (if you want to know how many, it can be worked out) to notice the manuals link. I think it needs to be somewhere more visible.
I believe we're, by very habits, habitual of having such links at the "top of page" and not "bottom" but then may be it is just to keep a different design from the other sister-site...