stretching wire

[Ron Nossaman]

> does wire stretch in the long term or not? are you saying that 
> it only stretches in the long term and there is no way to speed
> up the process? 

In the temperature ranges survivable by us mammals, piano wire 
doesn't stretch in the long term. What the roller is doing 
isn't stretching the wire, it's tightening the bends across 
the bearing points - and mashing the edge of the bridge cap. A 
more effective and less destructive tool for doing the same is 
a string hook.
Ron N