Larry, changing to a bypass setup on my QJet stocker and running a #8 line back to the tank stabilized the fuel pressure. The fuel and pump are both cooler since the pump isn't pounding away on the same fuel like in a dead head regulator setup. Unless you've changed pumps since your build, you're also using the Quick Fuel #30-175 pump?
Thumbs up for Danny Ashley, as well.
-Al