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