Here's my recommendation: Put down some tape where you want the hole. Draw a circle that represents the hole (trace the Kessil using a Sharpie). Now either cut out the majority of the hole with a hole saw or cut out the majority of the hole using a saber saw. Cut close to the line, but not right on it. Now use a power rasp to take away the needed plastic, right up to the line. Sand to make it look pretty.
Here's what I have.....a 3 1/2 inch hole saw, and two power rasps. Hope this helps.
Here's what I have.....a 3 1/2 inch hole saw, and two power rasps. Hope this helps.