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 {HEAD ~ the connecting interface} so as to form a rigid connecting interface between the axle and the guide arm allowing orientation of the axle in {TAIL ~ order} to guide the axle ; and 
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 { HEAD ~ the connecting interface } so as to form a rigid connecting interface between the axle and the guide arm allowing orientation of the axle in { TAIL ~ 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH