Riggers must be familiar with the assembly of the 3-ring  release since they may have to connect new canopies to the  harness and container or have to disconnect the main canopy to  untangle it after landing. Shown in  Figures 4-40  through  4-47 is the correct assembly sequence. The rigger must also be  able to inspect the 3-ring release to determine any wear. In  particular, the following areas need to be inspected: There are other products, which are designed to replace rubber  bands and last longer, but they have downsides. Rubber bands  other than military standard (Mil Spec) rubber bands may not  break at the desired 40–45 pounds and can lead to bag locks.  Other products may not have enough retention ability and  allow the lines to “dump.”  Figure 4-38  shows the various  rubber bands and Tube Stoes$^{®}$. In addition to the correct rubber  bands, the length of the line stows is important as well. In the  past, 1-inch stows were common, but today 3-inch stows are  recommended by several manufacturers.  Figure 4-39  shows  the comparison between the two lengths. The main point to  remember is that the lines must be stowed neatly and securely. Figure 4-40.  3-ring layout. Figure 4-38.  Rubber bands and Tube Stows$^{®}$. Figure 4-41.  3-ring middle through large ring.  Figure 4-39.  Line stow length comparison. Figure 4-42.  3-ring small through middle ring. Assembly of the Main Canopy To The  Harness and Container The rigger should be familiar with the various types of  canopy releases currently in use. In skydiving, the most  common release is the 3-ring release system. It was originally  developed in 1976 for skydiving, but has since become  the dominant release system for intentional jumping, both  civilian and military. 4-11