high fuel pressure is exactly what the pro mechanics suspected as well. I have a Carter electric pump and a Holley fuel pressure regulator. Weber specs say 2.1-2.5 psi. Mine was at 2.5 and I backed it down to 2.2. I unbolted and looked for drips coming out of the carbs with the pump running and the needle valves appeared to be doing their job.
I will post again when the thermal insulation gaskets go in.
Thanks for your input...