Step 1: To Be Improved...
The axles: the handcart wheels wobble a lot
The distance between front and rear (too short)...
Not very usable: constant tuning, breakdowns, lots of wear and tear...
Step 2: Improving the Hitch
The receiver wheel is quite small: if it will show signs of too much wear and tear, a larger size needs to be selected as replacement...
Step 3: Improving the Axles
The wheels have play horizontally.
The wheels can wobble away from a perpendicular position towards the axle.
1: Shorten the bushing (wheel size).
2: Apply lots of grease.
3 (Perhaps later: turn new, cylindrical bushings).
Update: replaced front wheels with better, non wobbling ones: the newer handcarts of the same model use better bearings. Someone needed more space in his shed, and sold his handcart for E 4.- !:)
Step 4: Improving the Standard Size
As long as traffic is not hindered and protruding loads are marked with a bright flag, everything seems to be legal.
Wide loads (> 1m) are not really legal. But if towed on a quiet Sunday morning, it would not create many problems. Most cops really like the looks of the trailer and don't know obscure laws about them.
There is no limit on length.
Step 5: Conclusions
2 If you occasionally need to transport large and odd sized loads, and cannot rely on the availability of a truck, this design will do the job!
3 Total costs. including paint: E 55.- (for the trailer, not just the upgrade).
4 This trailer works great for me!!! I have at least once a month some odd sized load to transport.
For small loads, I have my transport bags and my front transport carrier.
I will still need an intermediate, 2 wheel trailer, for taking a welding transformer, a power generator or gas powered water pump, but it would also be a nice challenge to build a bakfiets (riksha for cargo).