ORIGINAL: da Rock
The rear view pictures were to see if any obvious warps were present. They aren't bad enough to show in rear picture. But rolling is really more often a warp or trim problem than lateral balance. Do you fly with anyone who's good at eyeballing for warps? From one of the front pictures, it looks like there is a chance the lower right wing has washout compared to the lower left wing.
That is exactly what I thought looking at the picture, the wings are not symetric in plane.
You can take his great rear photo load it into Photoshop and put up a ruler line. It becomes far more obvious then.