Pascal:

I have a Fiamma rack.  Have had it for ~8 years.
It clamps to the top and bottom of the back door and
is very firm.  It does not move at all, even on some
pretty rough 4x4 roads.  I have a syncro.

You can see it at:
http://jones.colorado.edu/jones/Moab06

I bought it from Steve Lashley at eurocampers.com.
You can see a straight shot at
http://secure.mycart.net/catalogs/catalog.asp?prodid=4757794&showprevnext=1
and see the black clamps at the bottom that clamp under the bottom
lip of the door.

Gary Lee's stuff is top quality, too.

If you have questions, just p-mail me.

                        Richard A Jones
                        Boulder, Colorado