I've got a couple of Global knives that obviously need sharpening from time to time. Trouble is, local knife shops tell me that there is a "special" blade on these knives, and they won't sharpen them. (Methinks they don't want to help me because I didn't buy from them...) The shop I bought them from will sharpen them, but it takes like 4 days and they aren't really close to my house. And the knife I had them sharpen for me isn't anywhere near as sharp as when new...I can tell, becuase my newer knife, just bought last week which has not been sharpened yet, is ridiculsously sharp in comparison. I've never sharpened a knife before, so I'm a little reluctant to jump right in and ruin an expensive knife. Global makes some sharpeners, but I'm curious if any of you can offer some advice. Global sells a little clip that attaches to the knife, it's really inexpensive and maintains an optimal angle for whetstone sharpening. They also sell these little jobbies: ...but I'm not sure it'll do a great job. Any advise is most appreciated.