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