means for transmitting said effects observable command when the corresponding one of {HEAD ~ said plurality} of {TAIL ~ assignable user actuated switches} or keys is actuated 
of
means for transmitting said effects observable command when the corresponding one of { HEAD ~ said plurality } of { TAIL ~ assignable user actuated switches } or keys is actuated
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH