I just finished converting the Burley D'lite I got for $20.00 a few months ago.
It didn't include the rain cover and the wind drag that the canvas material caused was mildly irritating, so I thought about converting it into a flatbed.
The plywood deck that I've seen on others' conversion seemed to be easy to implement, but the weight of the plywood didn't inspire me.
I thought about using an aluminum sheet braced with square tubing, but discovered that I could buy a new trailer for the cost of the materials.

As I was walking through a shop, I came across this stuff and realized that I could just weave a floor with it.
It's lightweight, weather resistant, strong, and cheap.



Here it is finished, mostly.







The swinging arm in the rear was originally located at the top of the trailer and was used to brace the walls as well as hold up the seat.
I had to cut the arm down a couple of inches since the rails it attached to were wider than it's current location.
I still need to find something to plug the vertical rails that I cut, but it turned out quite well.

I used about 200' of the utility cord to weave the floor at a cost of $6.00, one dremel cutting disc, and a few zip strips.
It turned out to be quite inexpensive.

I weigh a bit over 200lbs and the trailer seems to hold me just fine, so I think that the new trailer will hold up quite well.