Antdog,
Here is Busse's warranty.
What kind of Warranty covers the knife?
The warranty explained by Jerry Busse:
"Busse Combat is proud to have the toughest warranty in the industry. Busse Combat Grade, Combat Basics, and Combat Customs are guaranteed for life against any and all MAJOR damage.
We have been asked recently how modifications of our knives might affect our warranty. Modifications can change the very nature and authorship of a knife. Simply put, we cannot warrant workmanship that we do not perform. Specifically, if you have modifications done to your knife, outside of our shop, and the modifications adversely affect the integrity and/or performance of your knife, causing it to fail, then it should be noted that "OUR" warranty will not cover "YOUR" modifications. We will, however, continue to cover the parts of your knife that are left unaffected by your modification. For example: If you have mastodon ivory grips put on your Steel Heart II by someone outside of our shop, then our warranty will continue to cover everything except the ivory grips. So be careful. BEFORE you have any modifications done to your knife, make sure that the person doing the modification will guarantee their workmanship. Busse Combat encourages extreme usage of our blades as they are without question "The Toughest Knives in the World".
We have no rivals. You can use a Busse Combat knife as hard as you like and our warranty has you covered."
"We are, likewise, the only manufacturer who guarantees our knives to ANY owner. You do not have to keep your receipt, or any of that other nonsense that is designed to frustrate the customer and make it difficult to make a warranty claim.
Got a problem? We'll fix it! We have never, ever had an unsatisfied customer with a warranty issue."
The way I read it, yes it would void the warranty.