This is where it started,

the Hannicgard tractor, 

All wooden tractor with functional steering (2010)

and the matching trailer,

Tractor and trailer (2011)  combination

followed by the Pick-up truck

Pick up Truck with steering (2012)

and from the other side (2012)

Which evolved into a Tow-truck

tow-truck: a further development from the pick-up (2014)