iron wound strings

[William R. Monroe]

Hi folks,

How about iron wound strings?  I've a client with a rather old Baldwin that 
has iron wound strings, in need of a new pinblock/strings, etc.  The client 
is interested in keeping the strings iron wound and I've never replaced 
irons wound with copper wound.  Are there pitfalls to be aware of?  What 
kind of tonal difference would one expect if we were comparing new iron to 
new copper?  I'd also be interested in arguments in favor of and against 
keeping them iron.

Many thanks,
William R. Monroe