Gee, straining the grey matter now Bob! I met Colin once back around 1975 when he sent a horse to a mate of mine to sort out at Ascot Vale. I can't remember the horse (don't think it amounted to much) but I remember my mate talking about Young Officer. Colin and Young Officer pre-dated my interest in the trots, which was started around 1970.
Can't help you much, but thanks for bringing up some names from the past. I note Brian Delaney died in recent weeks.