had a Valley blow over  and needed span pipe  and  trusses for  3-4  towers.   All the brackets and holes lined up with  the original Valley components that were
re used.   The galvanizing seems  good as well.   (time will tell)   everything was basically half price of  Valley components.  I saved about  $10k on that deal.
  As far as  drive line- centerdrives, wheel boxes..They are about the same as my  local 'aftermarket'  resellers-  not quite worth the drive down there for a  single gear box.     But for stocking up on several  boxes/drives for a complete system rebuild.. absolutely.