http://www.oople.com/rc/photos/x6/im...6oople-14.html
Only reason I point it out, as I am not sure, chatted to Jim about it, but there 'appears' to be a significant delfection between the wing mounts and definately a difference in height of the wing mounts.
But I might be wrong, or it is an exageration of minor flex as the tower is mounted behind the box so any twist will be amplified.