Bought this Lego Technic 6x6 remote controlled Tow Truck for my son who is 6, and built it yesterday, but the crane didn't work. So pulled it apart again tonight and started all over again. A massive 1862 parts. Just now i discovered one small mistake i made before (page 117!). The instructions are not that clear at this point. Hallelujah i can go to bed and finish it tomorrow.