Cat-Tracks or better yet, do what I did. I had 8mm riser lugs put on my boots (gives u additional stack height) and then the top of the toe & heel were modified to meet the DIN standard to properly interface with the binding. They are replaceable when worn down.
Jim- Here is another million dollar question: Do you know anything about Fisher's material abrasion resistance? No matter how I am trying to protect my boot soles, I still end up going over more than a few rocks when boot-packing, going over stone floors and stairs going to lunch, etc, so there is constant abrasion. As far as I saw the Fisher boot does not have a replaceable heel and toe pieces, so if the material wears out fast, you more or less have to get a new pair. The PU material of conventional ski boots is pretty tough, I am wondering if you heard anything from Fisher about how this new plastic stacks up.