Hi goff.
I can't tell you how Rupert and I tried to put the idea out of our minds. We spent a long time in the chamber there, shaking our heads. The problem is not so much the possibility of it being a fossil, but the explanation for the 'cut' and 'blow' marks. It is hard to convey in words how compelling the visual evidence is that these marks were made *before* it became rock. I cannot conceive of a tool hard or sharp enough to make marks like this in any kind of rock without shattering it and leaving such sharp, well defined edges. Well, not beyond a diamond edged buzz saw, that is.
It's a tough one. We're in the realms of 'forbidden archaeology' here. You can see why Rupert and I really didn't want to have to deal with it.