Dave fixing a leak is like me trying to trim my own bangs, sure it seemed like a good idea at 2am but now everyone gets to see the damage. A wrench on a cracked supply line is basically just speeding up the inevitable flood, and $240 later you got a free lesson in plumbing 101. Guess his "help" came with a hidden fee for the water show in your kitchen ceiling. At least now you know the real culprit was that tired old gasket, not the valve itself. Nothing says teamwork like paying for a mistake that was never yours to begin with, right?