Joerg wrote:

The rack has a loading platform to which
cargo can be strapped but most of the time
it's just the little trunk riding up there.
Key is the diagonal strut, a "false bottom"
and a flexing Perspex (Plexiglass) plate
pressing down the pannier hooks. Before I had
that the boom of the rack began to buckle on
rough terrain under heavy load. This is the
stuff the bike industry just doesn't
understand and the reason why many offroad
bike-packers have their MTB loaded too
front-heavy. You have to build it yourself.
Luckily one of my biking buddies is
a machinist and has an industrial grade
milling machine.

There is no interface to a rack on the bike, so
it has to be one that only grabs the saddle
pole. Compared to the old-school racks, with
stays down to the wheel-axle area of the frame,
where another person could sit (on the rack
I mean) while you rode the bike, this is not
good. But 10kg is better than nothing.

--
underground experts united
http://user.it.uu.se/~embe8573