Just as an option there is a free piece of software MaxCut v2 (Google it) that lets you enter each piece based on the raw material sizes then gives you cutting sheets for each piece. After a couple of years of trials, if you configure to only allow one rotation of the piece to make all the cuts it gives the best solution.
Note that these drawings were produced prior to team update #2. Please read team update #2 before cutting your parts as it deals with a few key dimensional errors in the original FIRST drawings.
Jason