You can't dispense soda and beer with one regulator. I have a primary set at #35 for soda, which supplies the two secondaries. One secondary is at #12 for most beers and the other at #2 for "real" ales, wine and cider.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk