i apologize if you're all tired of hearing about this, but I've reached wit's end. I have done extensive research, endured trials and tribulations, but still cannot nail down what's going on. Most of my research helps the common kegerator owner, particularly those dispensing commercial kegs. My problems also reach into carbing kegs of homebrew. My equipment is a standard fridge converted with a tap on the front door. The beer line is 3/16" ID vinyl (approx 10 ft). I have ball lock adapters secured to the end of both the gas and beer lines. I have a 3 gallon corny keg and 5ish gallon sanke keg. The sanke tap is converted with ball lock fittings for quick line disconnect. I have sprayed the entire system with Starsan in search of gas leaks, with none reported. My first attempt was using the 3 gal corny. I was obviously all over the place and only had 3 gallons to experiment with, so I obviously didn't expect perfection there. My main concern is with the second batch, using the 5 gal sanke. It was a Bock, so I lagered it for two weeks on 12 psi at 38 degrees liquid temp (measured in cup of water in fridge. Not completely accurate, but close enough). Two weeks to the day, absolutely no carbonation. Flat as a board. After tinkering with pressure increases over the next few days, I finally lost my cool and cranked it up to 20 psi. 24 hours later, I have a perfectly carbed beer with 1" head!! That unfortunately didn't last long; the next day proved to be too much pressure and poured too fast, causing wild beer. I slowly dropped the pressure to find the right serving pressure, but never found it. The beer, obviously carbed, was coming out flat with lots of head. I know this is long. If you've made it this far, thanks and I look forward to you thoughts. I'm beginning to think I need a new regulator, but want to rule as many of my process faults as I can. Happy thanksgiving all. Cheers!