I checked through some threads on the search but did not really find the answer.
I had a class not to long ago and they said that the old flaring tools will not work. The flares will leak. The new flaring blocks flare at a 45* angle. Does anyone know what the old angle was? And can you use the new 45* angle for other refrigerants. It makes no sense since you do not pick up different flare nuts for different refrigerants. From other threads I am getting the impression you need to put more pipe through the flare block to fit on the face correctly. Also Grainger sells a Rigid that does single lap and double lap. Does anyone know what this means? Rigid P#345DL/150/33927. Grainger P# 4A518