{TAIL ~ The drive apparatus} can be modified, with {HEAD ~ the addition} of a gear and chain, to reset or activate steel or other reactive targets 
{ TAIL ~ The drive apparatus } can be modified , with { HEAD ~ the addition } of a gear and chain , to reset or activate steel or other reactive targets
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH