This is a simple trailer, built entirely with using pieces from basic container trailer from the set. Truck remains untouched, all you need to build this flatbed are parts from the trailer.
![](https://bricksafe.com/files/M_longer/42078-alt/flatbed/20190103_130517.jpg)
![](https://bricksafe.com/files/M_longer/42078-alt/flatbed/Flatbed74_page_16.png)
Instructions can be downloaded for free directly from Sellfy:
More pictures can be found here:
https://bricksafe.com/pages/M_longer/42078-alt/flatbed