KNaB is exactly right. I learned from here and the Spyderco forums that this was a possibility to expand my stone grit selection for the Sharpmaker and for not too much money invested.
There is a picture of the example I was explaining of using 1x6x1/8" Congress stones on the Sharpmaker in this thread:
http://www.bladeforums.com/forums/s...aper-Alternatives-for-Sharpmaker-Diamond-Rods
The Congress stones are around 3 to 4 dollars each, I have 2 each of the Moldmaster 240 and 400 grit stones. I do not know about international shipping though...
I can't say how long these will last, but I only use them for a blade that is not ground to 30 or 40 degrees from the factory.
I am not very good at sharpening yet, especially knives that have a belly towards the tip, like the Skyline or Flash (larger model), so my angle towards the tip isn't exactly the same as the flatter section of blade closer to the pivot. If you can be consistent though, good edges should be attainable. And of course with more practice, you will get better. That's what I am hoping for at least...