a controlling device mounted in {HEAD ~ said first body} and having {TAIL ~ at least first and second switches} 
a controlling device mounted in { HEAD ~ said first body } and having { TAIL ~ at least first and second switches }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL