Dr Nick,
Excellent work on your first model.
Two things that were a bit out of whack.
Your model was huge compared to that required by FMS. I reduced it in size to 1/4 and it is still 50% larger than scale for a 1 meter span airplane.
In your .par file, you had -6 dihedral in one wing and +6 in another. If the wings are defined correctly with Mr. Masuoka's .par editor, then both would be plus values +6.0.
One other thing, your image map file should not have a file path name in Metasequoia as it messes things up when you zip the file up.
I find it best to start with an existing .par file from a model that flys close to the new model I am creating. It is OK to borrow if you are changing it and not copying it out right. If you copy stuff out right, ask for permission from the author.
Your updated model is located .
-- ggunners