Invest in a secondary regulator manifold so you can tune each tap. Every beer is gonna require a slightly different pressure in order to be balanced. Length of lines and diameter are ways to fine-tune your pour, but that's the odd way to approach it.
"Make sure that the beer - four pints a week - goes to the troops under fire before any of the parties in the rear get a drop." -Winston Churchill to his Secretary of War, 1944