Your statement "steering the Crane may be a bit difficult" was an understatement as I finally got B in but that was about it until the crane toss B out so I just gave up.
I had to reduce the size of the level in order to control the crane and, then, the solution was easy.
Amazing visual design and crane although already mentioned above it was difficult to manage it. Thanks!
Not difficult but the design of the mechanism is simply brilliant!! Thanks for sharing and well done @HulgoB