So I've been kegging my beer for about a year now and ever since I started I have had a problem getting my kegs to serve at the same pressure. I have 2 ball lock kegs, a standard dual gauge regulator sending 12 psi to both kegs, 5' of beer out line and a two-faucet tower. One keg always serves at a nice speed, no crazy foaming and perfectly carbed beer every time. The other keg pours out like Niagara Falls after a rainstorm, completely foaming over my beer, leaving it flat. As far as I can tell the only difference between my two kegs is the ball lock tank plugs and poppets. They are slightly different styles. One keg does have a nice dent in it, but I wouldn't think that should matter. I've cleaned every nook and cranny to make sure there are no obstructions, and there aren't any lines freezing over. Anyone have any insights?