Thanks M I hadn't looked on here because when I typed in Chalet in the search box it didn't throw anything back. However, I did look at lots of other images of Chalet and whilst there is similarities they all appeared to have a flat base. Mine rest on the four lobes but there is a small flat area on one of the lobes to balance it back out. I thought I found a mark but it was a little crease very minute. I saw a similar but also very different if that makes sense on Mark Hills blogspot