This is a trailer, built from a LEGO 8285 set with caterpillars from a LEGO 8275 set. The original trailer of the 8285 alternative set is adjusted. I've get the crane of it and turn over the wheel-suspension.
The trailer has become a little bit higher because I had turned over the wheel-suspension. Because it otherwise won't stand horizontal I've also made the hinge even more higher.
The caterpillars are going straight over the wheels, which goes easier when the wheel-suspension is turned over.
The shelf to ride over the trailercan be disconnected and if disconnected it will lay on the trailer itself.