The following Youtube link has multiple videos broken into chapters that will walk you through all aspects of Rescue 42 operations.
Rescue 42 Owners Manual
Rescue 42 PowerPoint
These are the technique videos from the extrication primer for easier reference.
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Ever wonder why 24" cribbing is better than 18"? What the limits of 4x4 or 6x6 cribbing are? Size matters...