Right. So you run the benchmarks while measuring flow then when you're done, take the block off, put it on the ground and run a simple loop, and measure both flow and pressure (nothing else).
You only need the flow or the pressure, while benchmarking; not both.
You then need to run the pressure and flow test on the side (off the bench). With the data that you collect, you can translate your benchmark results to dP instead of flow (or vice versa).
