Although I've used SolidWorks for several years, I've never had to do sheetmetal parts beyond the occassional simple L-brackets. I'm trying to make a curved skin that has two different radii along the edge that are tangent. I've read the post 'Curved Metal Sheet Part' posted by John Scott and was able to follow that to get the part made. However, the example uses a single arc for the base flange. When I try to flatten mine, SW gives me an error saying that the part contains features that cannot be unbent. Can SW2009 unbend multiple radii in this manner? And if so, what am I doing wrong?