A whole bunch of people here took to using those two part epoxy mixing sticks, and pushing one or two down the diptube to create some internal resistance.
Been awhile since I read that thread, but I seem to recall something about reducing the flow rate before the tubing, while still maintaining pressure is key. I think there was a commercial device for this as well.
If you search for "epoxy mixing soda keg" it will probably come up close to the top.
35 psi @ 42F through 15 ft works for me with plain water. Flavor changes the game.
Edit: the search feature on the phone app could not be worse if it returned random results from 1998.
This is the link: