Materials finally gathered, going to replace the factory idiot switch using an adapter and a Defi sensor. The sensor sits just shy of flush with the adapter which sits just inside the flow of fluid. Do I need to tap the adapter so that the sensor just protrudes into the fluid stream? Or with venturi/turbulence will the sensor give an accurate picture of fluid temp? The install guide doesn't go into that detail...and I never took fluid mechanics ha. Thanks!