Effect of lift on pressure settings

[frtyptny]

I have a True TDD-1 in the basement of the house, with a blower installed inside feeding cold air through a 4" PVC pipe that runs 10' straight up to the 1st floor, to my tower. The pvc pipe is insulated and the tower is ice cold. I am having serious foaming issues and am at a loss at this point. As far as the setup:

• 3 tap tower dispensing Dogfish Head 60 Minute IPA, McNeils Kolsch and Wolavers Organic Brown.
• 10' of 1/4" ID tubing between tap head and kegs.
• 3' of 3/16" ID tubing on each run.
• 12' of elevation change from the bottom of the keg to the tap head.
• 37 degree liquid temperature in refrigerator (measured constantly with remote thermometer - fridge is only opened to change kegs).
• Pressure is currently at 16 PSI
• I am at an altitude of about 230 feet.

Using the information here I figure that the 10' of 1/4 ID line is equal to about 8.5 lbs of restriction. The 3' of 3/16 ID line is equal to another 1.5 lbs. Add that to the 1/2 lb per foot lift for the 12 feet (6 more lbs of restriction) and the 16 PSI should be spot on. I get a TON of foam though... Almost every pour results in a full glass of foam...

At this point I think that my tinkering has perhaps over carbonated the beer? Is it time to think of a blended gas to deal with the lift? I just ordered a secondary regulator (3 way) to at least keep the pressures for the 3 kegs appropriate for the beers being dispensed, but I don't want to have this scenario repeat itself! I hope that someone can be of assistance!