{HEAD ~ A momentary push button switch} 73 is placed in {TAIL ~ axial alignment} with the drivetrain assembly 71 
is placed in
{ HEAD ~ A momentary push button switch } 73 is placed in { TAIL ~ axial alignment } with the drivetrain assembly 71
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH