an extended shafts position placing the guide device into the rigid state, in which position the opposing shafts are extended to a maximum and block the connecting interface so as to form a rigid connecting interface between the axle and {HEAD ~ the guide arm} allowing {TAIL ~ orientation} of the axle in order to guide the axle ; and 
allowing
an extended shafts position placing the guide device into the rigid state , in which position the opposing shafts are extended to a maximum and block the connecting interface so as to form a rigid connecting interface between the axle and { HEAD ~ the guide arm } allowing { TAIL ~ orientation } of the axle in order to guide the axle ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH