To cut out a windshield and try to re use it, we cut them out with piano wire. Usually takes two people. One inside the car and one on the outside. Take some piano wire, cut it to about 5 feet. try to poke a hole in windshield butyl and push wire through. Person on inside can hold wire with a vise grip or take a wooden dowel and drill a hole in the center of it to make a handle. Do the same for the other end. We have actual handles for this part but either of these tricks work. Slowly pull the wire on each end and that's it. Some times the wire will catch on clips and such and break. Just start over with a new wire. If it pulls too hard we sometimes spray glass cleaner or such on it to lubricate. Just remember old glass can get brittle and crack easier on install and removal.