I was around the car glass business a long time I have friends who work for nationals windscreens direct autos and the aa most ex autoglass who got the sack for work standards lol. Yes they can fit screens but I wouldn't have let them do mine even back then at autoglass? No and still wouldn't now! And the big plus with autoglass is if the car gets damaged and it's not on the pre inspection no ifs or buts it gets payed for.