Hi Glenn,
The Challenger is a lot of work. I got mine and farmed it out to AJ Lee to build it for me. Take a look at the following link, you will see how they go together. The front panels on the plane are gel-coated fiberglass. These are made to make the plane look more scale but are a little heavy. I just sheeted the front end on mine with balsa and monokoted the whole thing to save weight.
Good luck
http://www.flyinggiants.com/forums/f...u-project.html