Originally Posted by Andrew R Stewart

Yes but it's just that Rivnuts are more susceptible to install issues and poor in use conditions then a brazed in steel boss in a steel frame.

"I strongly suspect many of the failures are from poor initial setting at the factory." Says I agree with you in the initial install being a key.

But this isn't really what the OP is dealing with. He's going to repaint the bike and wants to update the braze ons. So I see this Rivnut/brazed in question as not being which is less effort/affect to the paint but which is the better choice before a paint job. For me to suggest he goes with bottle bosses that are Rivnuts and do the other bits with a torch is just wrong IMO. Andy