My first keezer is almost finished and I'm very close to making the move to kegging. I think I know what I need as far as line length for my serving lines, but a guy working at the local homebrew store told me that CO2 line lengths were just as important. I don't understand why since I will be using a regulator to control pressure, not flow. He also told me I don't need more than 5' of serving line per keg but most calculators I've used are telling me I'll need almost 10'. I feel like he's giving me bad info but I don't know enough myself to say for sure.