Is it possible to select different line caps on the same line in Xara X1 ?

I've been able to import Acorn Draw files with different line caps and they appear correctly, so Xara is capable of displaying such lines. However, I haven't found a way of creating such lines in Xara itself. Am I missing something or is it not possible at present?

It's a very handy feature at times (e.g. creating a slatted fence where the slats have a square base and a rounded top). There are work rounds of course, but these take longer to do and involve two elements.

Would it be possible to add a startcap/endcap option to the line gallery in Xara X2? ...please.