anyone happen to know how much weight i should be able to add to my garage door without having to adjust or getting new torsion springs? right now it only has one spring on it but i dont know the rating. ive decided that after i get the insulation kit in im going to cut some FRP fiberglass panels to put in ontop of it so it looks better. only problem is it will take 4 4'x8'x.090" panels which come out to weighing an extra 84 pounds or so.