In the embodiment shown, the form has {HEAD ~ an area} of diminished width to aid cutting of {TAIL ~ the probe shaft} at the outside perimeter of the form  
In the embodiment shown , the form has { HEAD ~ an area } of diminished width to aid cutting of { TAIL ~ the probe shaft } at the outside perimeter of the form
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH