You have to go well beyond finger tight because you need to crush the ferrule inside the fitting against the tube, otherwise it will just pop out when pressurized. In my experience, you'll feel the run-on torque spike twice, once when the cap of the fitting bottoms out on the ferrule, and then again when the ferrule is completely crimped. The second spike is where you want to stop. Then pressurize the system and check for leaks. Tighten as necessary to stop leaks.