Quote Originally Posted by david.fannon
... I made a new curtain wall type called "Louvers" which has the fin as the interior mullions and a simple frame for the perimeter and nothing for the panels. I used has type-driven dimensions to keep the spacing of the fins. Once this type is embedded in a larger curtain wall, it automatically gets the spacing, adding and removing mullions (fins) as required...
Classic example of good technique and of how to approach Revit -- don't get stuck & obsessed when one way you think of doing something doesn't work. Do it another way.

david.fannon's method would probably also work with your panels as the louvers instead of the mullions as louvers.