Yo Marlin,
Sounds like the footbed suggestion could be a winner for Ben. Especially since it sounds like he has room to spare.

I question your ditching the liner sock however. I can't imagine a liner sock causing any issues whatsoever. In fact I can't imagine myself on a trip without them. Perhaps we have differing understandings on exactly what a liner sock is. Then again probably not but I will post a link to those that have never heard of this simple but very commonly accepted remedy to preventing blisters.
  (You need to Login or Register

I like the thin polypro versions which fit snugly. They dry very quickly. The concept of course is the 2 pair of socks rub against each other instead of your skin. Works for me.  [smiley=thumbup.gif]