As the title suggests, Team Durango have published a shock build guide which can be found here. "In this guide we show you how to build the Team Durango shocks that feature on both the DEX410 and the DEX410R models. A well built set of shocks will ensure consistent handling and reliable performance. Here we show you how we recommend building your shocks to ensure consistency and repeatability when buiding your shocks. Assemble the piston on the shock shaft. The first step is to place the small washer on to the shaft."