Well this is a goodie.
Myself being a journeyman machinist and a fairly good smith can certainly agree to some extent.
I have always fixed or modified most everything I have ever owned.
NOW, I get the ocassional AR type gun that someone should have taken to the warranty shop rather than fix it themselves.
Had one that some clown decided to remove the barrel and it looked like they used a pipe wrench on the barrel nut.
When he then told me that the carrier did not slide in the upper correctly, I knew that the upper had been tweeked.
This fellow should have sent the gun in for the warranty fix.
There was really nothing wrong that I could not have fixed for him for may $10 or so.
Here it is, if you know what your doing, have at it. If you shoot well but don't do well with the tools, probably better to leave the smithing to the factory or a shop that can do the warranty work.
The ones that always irritate me a lot is the customer that buys a new pistol from us and a few months later comes back with it totally apart and in a baggy.
Had a fellow do that with a Ruger Mark III not once but twice, and the second time the thing had been thrashed.
I bought a new Ford Pickup 4x4 some yeras back, ran it 10K miles, yanked the engine out and installed something with a buttload more power.
Warranty, what warranty.
Just depends if you are willing to accept the repair costs if you screw it up.
Have fun.
Snowy