What has already been stated in this thread pretty well covers my feelings on this matter. You can do what you want with your property as long as you realize that once you have modified a knife, you are now the person responsible for the cost of any repairs that need to be done to that knife. The maker no longer has legal or moral obligation to look after, under warranty, any repairs that need to be done to the knife.
Also, any modifications to the knife will have a detrimental effect on the resale value of the knife. If that is not a concern, and the realization that what you are doing will void the knife's warranty also does not concern you, then by all means, it's your knife, do as you please with it.