I went ahead and hooked up the end of that one pipe that went into the stock Mikuni, coming from the charcoal canister marked "to carb". I cut the VC vent hose, since it had a sharp bend in it already, and used it to connect the pipe and the fitting on the bottom of the air cleaner. It makes a sharp bend leaving the end of the pipe, but not so sharp that it pinches shut.

If you look at the 9 o'clock position in the picture, you'll see a hole in the valve cover, close to the accelerator cable. I might try to use that hole to install a bolt with some kind of cable holder, with a nut underneath to raise the cable holder so it pretty much stays in the position where it is. The cable binds just a little bit at times, so I think if I can secure it in another place, like this one, that might take care of the occasional binding problem. The cable is pretty straight from that point down to the carb linkage, so I don't want to change it too much...