A very significant amount of tolerance is allowed for {HEAD ~ the fit} between the blade and the slot, thereby reducing {TAIL ~ the cost} associated with highly accurate 3 D joints 
reducing
A very significant amount of tolerance is allowed for { HEAD ~ the fit } between the blade and the slot , thereby reducing { TAIL ~ the cost } associated with highly accurate 3 D joints
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH