providing said second molding block with {HEAD ~ a molding projection} which extends through said {TAIL ~ second opening} and is aligned with and extends into said first recess when said molding blocks are against said base plate, said molding projection having a cross sectional shape for leaving a space between said molding projection and the edge of said second opening around the periphery of said opening 
providing said second molding block with { HEAD ~ a molding projection } which extends through said { TAIL ~ second opening } and is aligned with and extends into said first recess when said molding blocks are against said base plate , said molding projection having a cross sectional shape for leaving a space between said molding projection and the edge of said second opening around the periphery of said opening
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH