{TAIL ~ The shim} is then formed to include {HEAD ~ a feature} on its surface which complements the surface profile of the assembly surface 
{ TAIL ~ The shim } is then formed to include { HEAD ~ a feature } on its surface which complements the surface profile of the assembly surface
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH