A system includes {HEAD ~ a speed control module}, a repeatable component measuring module, and {TAIL ~ a repeatable component correcting module} 
A system includes { HEAD ~ a speed control module } , a repeatable component measuring module , and { TAIL ~ a repeatable component correcting module }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL