This chapter covers the Bill Of Materials. 
I think many people forget about the helpful material layout sheets at the end of the chapter. These guides will help you get the most parts out of a sheet of foam.
There is some confusion between the bill of materials, what you order from Wicks and what you order from Brock's. This is mostly with regard to some of the metal parts like the elevator torque tubes, if you are not paying attention you will have some tubing from Wicks you do not need. It's a good idea to understand the plans to the point you know what you are ordering and where it will go, then label it when you receive it so you know that it is reserved for a specific part. Several times I cut up the wrong piece of raw material.