This is Bryan's famous Triangulation Trimming boiled down into an easy to use guide. It contains two heavy plastic laminated pages front and back for sustained field use.
The guide acts as a flowchart incorporating descriptions of every fault in an airplanes performance. Those faults are listed and have a minimum of 3 associated adjustments which are prioritized from most likely to least likely cause. Adjustments are identified with an associated letter which you look up on the legend of the chart.
An accumulation of 30 years of experience in pattern design and competition, this guide serves as your personal airplane whisperer. The only thing better would be the man himself.