Hi Stevo
The trailer is built out of scrap materials: right angle aluminium from the scrap yard and plywood from packing crates.
A recumbent bicycle manufacturer was having a closeout special on it's Burley dog trailers at a price i couldn't refuse.
The trailer frame and hitch mechanism formed the base of my box trailer.
I will say that the trailer could be built using lighter materials to reduce it's top heavy effects.
Having said that, the extra weight is handy when wind conditions are strong and blustery.
The storage volume is amazing and no other product on the market offers anything even close.
Two full size wheelbarrows can be emptied into the trailer and there is still room for a backpack and spare wheels.
Naturally the bikes brakes become an issue in trying to stop 60 kilos when pushing from behind.
I would not recommend anything other than a good set of disk brakes with a 200mm front rotor.
If money is not an issue my preferred choice would have to be a BoB Ibex (
http://pedal****it.blogspot.com/2008/11/bob-ibex-trailer.html )with it's excellent rear suspension.
A uni-wheel trailer is much more stable in it's towing dynamics when used for a bicycle application.
So far i've traveled 3000 kilometers, most of it with trailer attached.
I've had a few nervous moments in strong wind when towing on empty but so long as you understand the driving dynamics you can modify your riding and also trip route to compensate for conditions.
Another interesting twist on the BoB Ibex design.
http://www.speedlobster.de/galerie.html
Fabian