Recently bought 8' xls with expandable wings to make it 10'. Now it plows great with wings retracted in but as soon as I open it to 10' straight or scoop the plow wants to grab pavment and lift up and down while pushing. I think the rubber bottoms on wings are a touch lower which is causing this to happen. I called the dealer there saying Fisher says once I plow with it for awhile it will break in and go away. Now we've only have 3 storms now and only have maybe 20 hours pushing with it but still seems like it wants to jump up and down with wings out. Called dealer again they said to bring it in they might be able to adjust rubber up alittle to help out. Anyone else buy one new and have this problem or just my luck? Also I'm plowing asphalt and concrete lots mostly level and smooth.