Used to use the old hose barbs on every connection, and had a funky, purpose-built copper line trio that went through the bulkhead on my kegerator (so I didn't have to have the regulator manifold in the kegerator itself). I always ended up with gas leaks somewhere and went through a lot of gas and decided the $100 was going to pay itself back. Have less interfaces now too since the three 8mm hose fits through the bulkhead. Haven't leak checked everything yet, but other than the fittings going into the regulator check valves everything worked well. Gonna get a set to do the tank to manifold next.