Rich,
Was the engine on sand anywhere on the climb?
Gary had to use sand only at the bottom of the grade on the connecting track where the NS track guys greased the rails. Once clear of that area, there was no further need for sand. The rail conditions on this day were very good.
And do you know the percent grade?
It varies between 1.5 and 1.7%. And the 1.7% section is on a curve just past Plymouth Road. The train got down to .68 mph in that curve. The video clip in the OP's post shows this.
And do you have an estimate of trailing tonnage?
27 cars, average of 85 tons per car = 2,295 tons.
Very nice video, Rich. Were you hand-holding the camera? If so, quite steady. Sometimes I though the only disturbance was from breathing! Yours, not 765's 
Shot with my iPhone 6, hand-held. You just have to know how to do it.
