5b. Posterior rivet assembly   In this section I'll be installing the posterior "S" snaps. Continuing from 4g   Note: Line 24 snaps will work here also.   Reference pic. A you'll notice some have 1 snap others have 2.        Using a two snap system, starting with the posterior measure in 1-3/8" and 5/8" or so from the tip of the cod.       As mentioned in the ab sections , using the same specifications to drill hol