I never cut a hole, just positioned the tube where I wanted it to drip which can be tricky at times cause the water pools and drips not exactly where you want it. If you tap you finger on the screen you can usually get the water to start dripping where your finger is. I have a Flukers drip and I took off the tube and found it much easier to not use the tube and just let the spicket drip right through the screen. You can position it exactly where you want it to drip and it stays there. With the tube laying on the top of the screen sometimes the water starts dripping in other places as the water collects..