REDDOG......
I have a Kershaw Leek 1660ST, I've had it a couple of years and it's been a very good knife. No problems at all.
As far as getting your knife replaced, they're replacing it because they no longer have a clip that fits your older model, so the blade being modified isn't an issue. Afterwards, if you still feel uncomfortable with it just go out and buy yourself a new Kershaw! It's a win/win situation. Besides, you can't have too many knives!
smitty