hi there, ive just finished converting my sierra from boring old 1.8td power to 2.5 bmw power, but ive had to remove the heater matrix to make room for the extra 2 cylinders, ive found heated windscreens online for these but im not sure how you go about wiring them in, also can you change the windscreens in these on your own or do you need a glass specialist?

cheers
Jamie