That's pretty cool, Dave Armstrong!

Dan Burkhart - they're probably not the same thing, the croozer has a plastic base, for example (30kg max load).
I don't know if Erde actually made that trailer themselves or just buy them in from elsewhere, so they may well share identical components.

According to my calculations, the steel bed on these trailers weighs about 3.5kg or almost 8lbs. It might really be worth chopping them up a bit...

Those "FEHA Design" brand trailers only weigh 7.5kg! wow, half what these weigh even with the steel bed removed.
I wonder where all the weight is. Maybe it's just steel vs. aluminium.