With PPRUNE page and post numbers in flux due to moderator actions within these busy / large threads I recommend referring to previous posts by entry date and time stamp. That is one thing that seems to remain constant. Of course that is subject to the users time zone. If you pull up PPRUNE and don't sign in I believe it shows universal time. I can find it a challenge to do the math for my time zone and then daylight savings comes along and shifts it all by an hour!