My Sigma 6000 stone is starting to show a slight hollow so I thought to myself: "What's the cheapest flattening stone available?" The answer is a Skandia whetstone. Skandia is Bahco's cheap little brother and I bought it for €6 ;D The size is 125x50x25 mm which is more than enough to flatten a waterstone. The orange side is 120 grit and the white side 280 grit. I took a small diamond coated rod and made some diagonal grooves in it so it doesn't stick to the waterstone and it also helps in the removal of slurry. It's a very hard stone so it will probably never go out of flat using it only to flatten a waterstone.
