Next, lets talk about Modifications to the blade.
The most common is to alter the edge bevel.
That is ok on a user, and on a fancy overall upgrade.
Most safe Queens do not ever get the Bevel changed.
I wonder, a few years for now if the Asym edges left factory will add to the value, it will certainly date the knife.
Thinning the edge on a smaller Busse seem to either not affect the value ot to raise ir a little.
Thinning the edge on a Big Chopper on the otherhand seems to really be a personal choice and not very popular.
Other Blade Modifications,
Top grinds, Swedges, larger choils, sharpened Choils, Serrations, removing and or opening up the Talon holes, file work,
To me depends on the quality of the work, but not real important who did the work.
More, "Do I trust?" the person that did the work.
I have been involved for about 9 years and am for the most part do not care anymore about the warrenty.
I have done Terrible things to these knives with hammers, Ballpeen to sledge and cut car frames using Busse knives as a chisel.
If it looks good and I trust the grinder I am good to go.
On the otherhand, most people worry about of they break the knife "Will Jerry replace it?"
So, for some people the odd Grinder will lower the value of the knife.
By the Way, thin tips on Big Busse knives tend to bend not break, just bend it back and carry on.