OverClok was seemingly fighting the same problems because he broadened some supports in #6 to a trapeze-shape.
I find refining this kind of bridge very difficult, because I cannot refine a working design to another by small working steps - intermediate steps would show twist, and I wouldn't be sure whether that could be remedied by a small change or whether that idea was worthless.
Calis, if you would provide some construction strategies, I'd be forever indebted to you (or at least for as long as your new title lasts :-)
AFAIK, Vienna has some nice bridges, too! http://www.pontifex2.com/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>