We want to avoid the added complication of a Collins Lanyard, but we also want to make sure the RSL won’t pull the reserve pin if the RSL-side riser breaks.  So we designed the riser and RSL to work without it.  The RSL attaches to the riser below the weak point of the riser, the point of the grommet.  If the riser breaks at the weak point, the RSL stays with the rig.  The riser might break at the bottom if the ring becomes corroded.  So Wings Tandem only offers stainless steel rings.  And if the ring assembly becomes inverted and the riser snaps, the free-floating RSL stays with the rig.