The trailer has 2 columns that are controlled by an M engine and is connected to an IR-RECEIVER.
The supports are a modified replica of the pillars of the Lego Technic sets 8053 Mobile Cran.
The ramp is driven by a motor M and is connected to a IR receiver and remote controlled.
For this, the trailer was equipped with a battery box.
He also has a winch which is a modified replica of the Winch of Lego Technic 8109 Flatbed Truck.
The trailer was the "Lego Digital Designer" created and exists from a total of about 1800 items. Since I in assembly repeatedly reschedule mute, there are no instructions.
I have invested a total of about 240 euros and several weeks of work.
Sorry for my bad English, i am from Germany.