There well could be better carb tuning pages somewhere. Here is some good info Ihappened to run into.
I myself have a book for rebuilding Weber and Dellorto twin carbies. I have no need to resort to instructions in the net.
For anyone really interested in twin carbies and all what's involved in them, I recommend this book:
http://www.veloce.co.uk/~veloceco/cgi-bin/cart.cgi /V164.html?mv_pc=305