[marccenter]

Carrie,
I know you asked specifically about welding the 1/4 polycord together, but, have you ruled out completely using the little metal or plastic pieces to hold them together (McMaster-Carr)?
I asked Warren Hilldebrand (sp?) at Roch Adams about this issue in particular this year before going down this path and he assured me that they have had no problems with using the joining pieces for many years.
If you choose to go down this route and need a few pieces, yesterday?, let me know, we have some at Lamphere High School.