Both axes of the gimbal have {TAIL ~ a combination} of auxiliary generator and motor with {HEAD ~ a locking mechanism} 
Both axes of the gimbal have { TAIL ~ a combination } of auxiliary generator and motor with { HEAD ~ a locking mechanism }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD