I have the 30/40 add-on for a 3-element SteppIR. Seems to work well.
However, the middle element (a double element with a "U" fitting at each
end) droops more that the two simple elements. This probably does not
affect the operation of the antenna, but it looks odd.

I have been thinking about extending the mast a few feet (probably with PVC)
and using dacron rope from the mast to the ends of the middle element, to
give a little more vertical support. However, unless the mast extension is
rather long, there would be a substantial horizontal force pulling the ends
of the element toward the center.

Has anyone done something about the drooping center element?

Bill - W2WO