The manual calls for a "restrictor hole" in the engine location where the OP sensor taps into.
My p/u point is a 1/8" npt port in my FW located remote filter/thermostat incoming oil galley. I am mounting the OP transducer in this port. The transducer itself looks like it has about an .020 hole in it. Is there a need to further restrict oil at the remote filter port? Why?

Thanks,
John