There are NO TWO DIFFERENT DIES of the superwing mast that I know off.

As far as I can tell there is only one; but while I'm often pretty up-to-date on these matters I can always be wrong.

I have been part of a project to design a new alu mast to replace the Superwing section but that project was put on hold before a new die was made. To my knowlegde this project has not been revived. Maybe that is the source of the rumour ?

Wouter