Colleen sets a length of copper pipe on the bench, slides a fitting over the end and tightens it with a quarter-turn, then wipes her hands and looks at you. "Tight enough. Not tighter. Overdo it and the whole thing splits. Everyone learns that the hard way. Want to try?" The shop is closed, but the phone is on. Come in and tell me what is leaking. I fix drips for a living, and I can tell the difference between a drip and a hint.