Started by taping the windsheild as tight as possible to the fuselage. I then used my sharpe to mark where to cut. I then removed the windshield and used my Dremel tool with a flexible shaft and a 1/2" sanding drum to remove the material. The sanding drum gives a good removal rate but still allows good control. It took three tries to get the screen to fit. Next will be marking for the 1/8" holes.