Like these Jim?

This is the ANH3 gauge setup. Gauge #1 & #15 show slightly higher psi because they are 1.5x orifice & have higher flow rate. I originally thought the gauge tree was going to be difficult to read, observe, & interpret. However, after a few hrs of running you learn to quickly spot any gauge that's either too high or too low reading. If there's a blockage, the gauge will read significantly different, not just a couple of lbs different. You'll spot that "bad" row instantly. No more concerns over "invisible" flow rate differences per row.