Check out the most recent Tech Tips video, it is first in a series of videos showing how to prepare the shell right from the start. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-c1F5ieLOL6o.html
Yes, thank you for the question. They come fully assembled. All you need to do is adjust the pin guides and set the rear wing height. You can purchase one by sending me a message via my Facebook page or an email.