{TAIL ~ A spring} 72 of adequate stiffness biases the drivetrain assembly 71 forward in {HEAD ~ the tool housing} 
{ TAIL ~ A spring } 72 of adequate stiffness biases the drivetrain assembly 71 forward in { HEAD ~ the tool housing }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD