I don't understand the reason behind the extractor modification. As for most people not having an issue, that is not a very positive endorsement for a non-engineered modification of a component that is part of pressure/force containing system I'm relying on the prevent the bolt from being ejected directly into my face. I have two 700's with rivitless extractors and I will admit the first one had to have a new extractor which I easily installed and neither have had a problem since.
Unless the Serial Number on the rifle begins with RA RemArms will disavow any warranty on a rifle. During the 2020 bankruptcy the old Remington Arms Company was dissolved and the company known as RemArms purchased only the factory and intellectual property for the the firearms produced in the Ilion NY facility. They assumed no liability for anything from the Remington Arms Company. In fact, RemArms does not own the trademarks for the use of Remington 700, etc as Vista Outdoors owns those trademarks and licenses the use to RemArms.