I learned the importance of properly accomodating for Unity’s left handed system when exporting models from 3D packages that use right handed systems.
I use blender for modeling (learned through ben and mike’s course, yay!) and it uses a right handed system where Z is the vertical axis as opposed to Y, so you have to make sure you give your object the correct orientation before you import it.
4 Likes
I use blender as well. 
Good luck!
1 Like
I had begun to suspect that might be the case thanks for the confirmation.