In another configuration, {HEAD ~ the bottom ply wall} extends downwardly from {TAIL ~ the bottom ply lower surface}, such that the well is below the bottom ply lower surface 
extends downwardly from
In another configuration , { HEAD ~ the bottom ply wall } extends downwardly from { TAIL ~ the bottom ply lower surface } , such that the well is below the bottom ply lower surface
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH