I've said it once and I will say it again. Without before and after numbers on the same flowbench there's always that BIG question mark at the end. I understand time is money and BIG numbers gets you more work but I like to do the math myself to judge whether the numbers TRULY stack up. Especially if the head porters bench is still from the "purple shaft age" with liquid manometers. You wouldn't believe how numbers could swing on my old flowbench during an 8 hour day.