Kegged a kolsch a week ago. It's been sitting at 12psi for about 7 days. I've just bought a kegland flow control ball lock valve and evabarrier tubing (4mm ID and 8mm OD). Does beer line length still matter as much using one of these? I'm concerned that the valve might cause some foaming and I want to make sure that if my beer isn't carbonated it's because it needs more time on gas and not because the valve is causing foam and the beer appears flat.