If you build the Academy Blackhawk,, look up a review on it here on FSM. It was very helpfull to me,, esp when building the cabin and seats. I have a post with pictures on this forum of it. The title is Blackhawk Main Rotor. All in all, not too difficult,, parts fit nicely. Have fun on whatever you decide!
PS here's the link to the review http://www.finescale.com/fsm/default.aspx?c=a&id=197
Joe