The message
from Rob Morley contains these words:

Or just fore/aft, to keep the weight low. Probably not the safest thing
to have sticking out the side, though, and it might wreak havoc with the
aerodynamics.

Trailers don't do "aerodynamics". Except Airstream caravans of course.
And possibly those little trailers made from a top-box.
http://china-centralsupply.en.alibab...s_Trailer.html

--
Skipweasel
Pay no attention to that man behind the curtain.