After calling up the assembly that I saved after a crash.... is saved during the crash. I was worried one or another file might be corrupt if the system was only able to half way save a part. I've had that problem before. After calling up the assembly successfully, the surface normal are all flipped when shading the assembly. The shaded view is literally inside out. The sub assemblies are all fine it's just my main assembly. Any ideas on flipping the normal or is my Assembly corrupted for good? I could probably rebuild the assembly in 3 hrs but I figured Id give the forum a try.