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I got the base model. I needed to spend 220 bucks on the finer stones. so I have 550 dollars wrapped up in in it. I sharpened all the knives in the house the first day. the only problems I have are my Becker BK2. it's so thick it throws the angles off and I have to use a angle square. also my spyderco tasman salt the hawk bill is impossible to sharpen with it.