As I already mentioned, I get the same error with the Spits as with the original FSX Demo Beaver floatplane.



The visual model will not display in the latest Demo & I imagine this is the same in FSX proper & the same error that Kevin is talking about. The above error usually defines a conflict with the MDL file.  The Beaver is MS default & I assume it was created in Gmax or 3ds Max. It must have been updated in the full release version.