I'd buy a pair, especially if the pack contained a board 25 with Escarpment printed as a whole board variation. While the 10z and 17z were a bit of overkill for the 10x8 hex changes, the Escarpment overlay covers over half the board and would be a worthwhile effort. Once I had a 2nd (or 3rd?) copy of the original mounted board 25, I permanently glued an Escarpment overlay onto it. It was too much hassle realigning the two again and again.