{HEAD ~ A first and second mounting portion} is connected to {TAIL ~ each} of the at least one tool support structure and is connectable to a first and second mount on a base, respectively 
is connected to
{ HEAD ~ A first and second mounting portion } is connected to { TAIL ~ each } of the at least one tool support structure and is connectable to a first and second mount on a base , respectively
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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