That is what most people have said is that theirs came pre-hinged or at least had the hinge slots cut.  Like I said, TBM's manuals leave a lot to the imagination because there isn't a lot of details.  My only thought is, if you are expecting the customer to hinge the plane, then there needs to be information in the manual that describes the wheres, the hows and so forth.  Don't just leave guys hanging.  This is a great looking jet and from what I have seen is a blast to fly.  I am not at all disappointed with it, just the lack of thought that was put into either the building process at the factory or TBM's quality control check on the products they are getting.

Blaine