I signed a contract to have aluminum siding installed on my home. However, Alcoa (originally agreed to as product supplier in contract) no longer makes aluminum corners, which I want instead of strips on the corners of the house. Contractor (without my knowledge) changed the entire order to Quality Aluminum (out of Flatrock, Michigan), which does make the corners. (Contractor notified me before installation but after he'd already ordered the materials.) I cannot find anything about Quality Aluminum to determine whether they manufacture high-quality products. Does anyone have experience with this company's products? Would you recommend them? Thanks!