You can use a saber saw. It cuts like butter. Make sure you tape the windshield so that the foot of the saw will be advancing and coming in contact with the tape and not the windshield. Draw your line on the tape and just follow the line. After cutting use a palm sander to remove and marks from the sawblade. Then put a little MEK on a rag and just pass it over the edge of the glass which you've cut and sanded and it will come back like new. MEK stands for Methyl Ethyl Ketone and can be bought in most hardward stores in the paint, thinner, solvent isle. I've done two and they worked out fine.I have an x-tall tulsa windshield and want to cut it down. Does anyone know where I could get the windshield cutdown?