Build took me multiple days. By far the most difficult build I've ever done. Crane functionality is actually pretty good. Driving and turning isn’t great but just the massive crane functionality is good enough for me and the 4 year old. Uses 6 large motors, 1 medium sized motor, and an XL for the drivetrain. 1 rechargeable battery pack runs the anchor system, driving and turning, another in the base of the crane - which also acts as a counter weight - operates the crane functionality. ...