Fuel return with Webers?

[acaskie]

This is an issue for me and at least one other person I know running a weber set-up: When the engine is shut down, the remaining pressurized fuel in the system finds a way to squeeze out, presumably along the butterfly shaft, and leak down onto the manifold. In my case, it isn't a lot of fuel, usually about a teaspoon full, but enough so that when it evaporates on the manifold it leaves a noticeable residue. Call me old-fashioned, but it doesn't seem like such a good idea to have any fuel running around loose in the engine compartment.

Even with only 3lbs of pressure showing on the gauge while running, when the engine is shut down, the pressure initially rises to about 5lbs before slowly bleeding off.

I'm not sure that this is enough of a fuel stream to consider a fuel return mechanism, but I am curious if this is a common problem and what others have done about it.