Weber idf 44 leak!, Help! Options

[Milkman7286]

Hello all,
I've got a 71 4 banger with dual weber idf 44's on it and the driver's side front barrel has sprung a leak.
Here is a little detail before I go further into the leak:
The webers are about 6 years old and have about 7,000 miles on them. The car sat in storage for about 3 years but was started and driven every 6 months or so. For all I know this leak has been there all along and I never noticed, but I don't think that is the case.

The leak:
The carb is leaking gas down the front barrel on the drivers side. It appears to be coming from the progression / transition holes but it is hard to tell. The other thing I noticed is that the gasket just above the float bowl is very wet and the gasket between the carb/manifold is also a little wet. I have been dealing with this for about 2 weeks now and have read every possible thing I can find and none have solved this.

Here is what I have done so far:
-Float set at 10.5mm measuring with the gasket in place.
-Butterfly was loosened and repositioned in the bore.
-Needle and seat have been tested both with fuel and air and are good
-float is free in movement and does not hang up in the bowl
-float is still a float and does not sink
-idle circuit is free flowing and not clogged
-fuel pressure is 2.5
-float bowl gasket does not accidentally cover any holes or vents


Any ideas on this one? I feel like I have tried everything and for the life of me I can't figure it out. Last night I was watching the fuel puddle on top of the butterfly and it seemed like maybe it was coming from the seam at the float bowl gasket. Any reason why fuel would be coming from there?

As FYI:
This happens when the car is hot or cold, doesn't matter.

[Milkman7286]

Ok guys I finally got around to the carbs again and I removed the carb from the car to install phenolic spacers and here is what I found:
Without being on the car, I can't get the carb to leak on top of the butterfly. However, the same barrel that I have been having issues with all along will leak fuel from the mixture screw hole under the butterfly. I had to coax it to leak (move carb a bit or shake it or tilt it) but it would leak. I couldn't get it to leak if I turned the screw in all the way. Yes the screw does have an o-ring on it as well as the spring. If I tilt the carb backwards a little fuel will drop from the outside of the screw (where you adjust it by hand or via flathead screwdriver)

Obviously the carb isn't tilted when it's in the car, the above is just what I observed. I put in a new float, mixture screw, mixture screw I-ring, and mixture screw spring as well as all new gaskets but have yet to test any of that to see if it will fix the issue. Have yet to test the spacers either to see if percolation was part of the issue.