Blue2000S has my old screen and will conduct the flow bench check through the screen next week he said. In the mean time, I've got a flow meter that I use to balance my sand rails twin 44 IDF's. I was thinking that I could put my snorkel back on and place the flow meter on the snorkel and measure the flow rate at idle. Then install the intake screen and read the meter again. There should be a delta, and that delta would be the restriction, at idle.