John, the last seive was an airfoil from loewen. Also I had the Peterson airfoil in a 1660 and it lasted a little over one year. It didn't crack, but many of the wires wore out and broke. No warranty from loewen, I even sent the seive back to them. lucky for me, the dealer I bought it from gave me credit towards the purchase of a new one, which I purchased for the 1688.