I will add some other photos of the construction and Nicolas is preparing some movies.
I have theses photos of the design of the hamster and the cranes which run straight and stop. This is not exactly the final design.
As you can see, I had to double the circles on each side to have a more rigid structure. The alignement of the hamster in the cage is done with some thin 20T gears.
The first idea was to clim a ramp and fall on the small truck but the problem was that the truck is going backward. For this reason I decide to create a rack ramp.
This first hamster will never run himself on the floor... then I created a second hamster for free run (the first one in LEGO movie, unfortulately it is accelerated).
This is the first version of the MOD crane chassis. I had totally removed all the mechanism and the chassis is very simple. It respect the original size. In the final version, the battery box is in the up part of the crane.
The visibles parts of the crane are added to my chassis.
To be continued...