The invention also comprises a method of block molding and a mold assembly which may be used to make a block which may be stackable to form {HEAD ~ structures} of {TAIL ~ varying setback} 
of
The invention also comprises a method of block molding and a mold assembly which may be used to make a block which may be stackable to form { HEAD ~ structures } of { TAIL ~ varying setback }
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 HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL