Today I tried everything, and got the pump working pretty flawlessly.

The narrower fuel line did nothing.

I set up a 'T' very close to the carb as I was told by Connely. I first tried it with a one-way valve in the line and this was not much of a help. There is no pressure running through the extra line, just fuel. I believe the fuel got to the valve and stopped.

Last I tried with regular fuel line from the 'T' to the tank, and found satisfaction. Very, very good transition, easy tunability, and much better fuel consumption. I tried this setup first with the extra line feeding into an external tank, and A LOT of extra fuel was coming out. The Perry pump really works harder than it needs to. All that extra fuel that was bogging down the transition was getting shoved out of the muffler, unburnt. With the extra line, all that extra fuel just goes back to the tank, and I got a few extra minutes of run time.