A zero edge doesn't HAVE to be thin - although that's what it will be on a flat grind. But trust me, after handling the killa zilla, it's quite possible to have a full convex zero edge with a LOT OF STEEL behind the edge. <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />
Your quite correct.
The first generation CS Trail Master had a convex zero edge. They were quite sharp and the edge was well supported for hard contact. There were a lot of complaints about sharpening them. I was not really wild about the angular transition on the edge as it was pretty steep. Again it was not made for cutting but rather for general use including chopping.
