I was thinking of my time as an F/E on 10Sqn VC10 when I recalled there was a synchronizer indicator above the F/Es thrust levers and it had 3 little props...but cannot remember why only 3...there were 4 engines.
Also, I remember we sometimes put the outboard engines into idle reverse to assist the tug pushback....the RAF only had 2 reversers...did the civil version have 4 reversers?