I will admit I DID NOT READ every response in this post.......
BUT as a guy who's pulled more windshields in the last 26 years than anyone else (?? most likely anyway??) on this board I'd like to offer a few tips and observations
First .. any type of blade or knife type of tool for shield removal.. is good for one thing. Removing cracked/broken shields. I'm not saying a few have not been removed successfully using these tools but they are not the tool to use on a "good" sheild. SAVE YOUR MONEY.
Second... Over the years I've used a few different methods for successfull removal. All have involved wire. Shield removal is an aquired skill... you aint that good! Different cars used different seals and age does play a factor. I know what I'm doing and have broken a few over the years. Developing your techniqe and knowing what tools to use where takes time. This summer I sucessfully removed/sold the windshield from my 68 Charger. Ol ' BIGS did this all by his self. I didnt want my guys screwing this up as I knew there was NO second chance.
Three... windshlieds are like people. Unpredictable, tuff as nails, and fragile as a newborn all at the same time. Just because you can hack away with your ice scraper when its 10 degrees out doesnt mean it will survive that little titch with the screwdriver when you tried popping off that trim piece. Also when you do get one out, keep in mind its not a piece of 1/4 inch plywood. I can tell you a hundred stories of customers picking up shields and breaking them when they tried to load them.
Four... keep it simple. We get our windshield wire from Brock supply. You can buy fancy grip handles, but we just cut a few male seat belt ends , attach the wire and go from there, be very carefull with your initial cut through. A slim blade like a shapend old steak knife seems to be the prefered tool my guys like. Cut striaght dont flex the blade. Them after your hole is through guide the wire through. Then attach your ends or just put on your work gloves and go at it. For the inexperienced GO SLOWLY ITS NOT A PIECE OF WOOD!
Fifth... patience grasshopper.....