Michi
I dislike attempts to rewrite history
Thank you for the suggestion, that's a nice way of attacking the problem from a different angle!Michi, you could think about getting a mat or that open grid they use behind bars to put at your cutting location.
I'm currently talking to a board maker in Tasmania who will do custom orders. I might be able to get an edge grain board that fits the space and isn't too thick. If not, I'll probably just put up with the bamboo one I have and resign myself to having to sharpen a bit more often.
I did look at the various Japanese rubber boards. None are the right size. The ones with a wooden core can't be cut to size; I did find one without a wooden core that would be large enough to cut off the 50 x 60 cm size I want, but that's not a cost-effective option.