This enormous Technic rig was discovered by an Elf on Flickr. It starts of course with the official LEGO 8258 Crane Truck set behind which Ingmar Spijkhoven has constructed a matching Power Functions controlled steered-axel trailer (complete with excavator set load). The set-up features a huge variety of working functions, both from the official LEGO sets and Ingmar’s complimenting creation – it’s definitely something we’d like to see more builders attempt.

If you own an 8258 set Ingmar has released instructions for his creation so that you can add your own trailer too – click the link above to see more.