BOOM, I can confirm my foreign suspect was within 25 miles of the v23 flightpath prior to the hijacking.
Larry Carr has stated that he believes that the hijacker wanted a quick jump from the plane, but got delayed because the plane didn't take off with the stairs down and he couldn't get the stairs down in flight and the pilots had to slow down the plane. His LZ was delayed. I concur..
That means the hijackers desired LZ was much further North.. He must have scouted the area..
I have evidence that my FOREIGN suspect was within 25 miles of v23 just south of the first plot on the map prior to the hijacking. That is likely where the intended LZ would have been.
This would have to be an unbelievable co-incidence..
How long did Cooper spend with a parachute on and was still on the plane? How many hours start to finish? 
planning vs execution is the minor point here,
The take-away is a foreigner with 50+ bits of circumstantial evidence can be placed right in the area prior to the hijacking.. that is in itself amazing..
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The point is, early departure from the airplane for Cooper was a total impossibility - given the short list of everything Cooper had to do. Surely Cooper could keep track of time and add and subtract! Whatever Cooper "intended to do" or "whatever Carr thinks Cooper intended to do" ........ it was the events that dictated the schedule. Intentions are irrelevant and Cooper is smart enough to know that!
He could have put the chute on early precisely because he knew there would be delays and he wanted to be ready whenever the opportunity for leaving occurred.
Cooper has taken control of the plane and held his ground on the plane at Seattle with his bomb. Cooper's uppermost task is not to be taken, captured, on the ground or in the air, or after bailing. Once airborne Cooper's next task is to get off the plane ASAP.. His driving need is survival and not being captured. Has nothing to do with bailing early because he has some destination near Seattle. Carr's speculation is irrelevant. Then when finally in the air what does he do - he waits AND PISSES AROUND MORE! Then he bails further south. Cooper bailed when he wanted to bail ... when he felt safe to bail. He was given full control to bail whenever HE wanted.
Carr's speculation is irrelevant and probably wrong.
Your arg is valid though I disagree.. he wanted takeoff stairs down, he tried to get down the stairs but couldn't and was delayed. I agree with Carr on this point.
My broader point though, is not against your arg but that it is contextual minor and relatively inconsequential to evidence that a foreign suspect is confirmed in the area prior to the hijacking.
Wherever the intended jump zone, a foreign suspect was very close prior to the hijacking. 20 miles or 150 miles, it is significant.
'he tried to get down the stairs but couldn't' is not quite accurate. He simply dropped the matter for the time being - chose not to force the issue. He moved on to other things. He also chose not to pursue the issue of the missing backpack - he could easily have demanded they get it ASAP! Remember he said: "no funny stuff". Then he allowed the stall on refueling! That was a huge delay; not good if there was a tight schedule like people to meet and in particular time and place? And the list goes on and on and on. I tend to think he intended to bail sometime before the Columbia River, or near the Columbia if he could see the lights of Vancouver-Portland coming up, but I could be wrong. All-in-all I think he did exactly what he wanted to do and was comfortable with that. Everyone cooperated so well .......... 
This is theoretical and we will never know what was in the hijacker's head but my 2 cents in negotiable American currency..
The hijacker clearly had a target LZ that he was familiar with, either scouted or historically knew very well. The highest success probability was an early exit. The terrain was better (re lakes/rivers, flatter and many open fields), the proximity to (Tacoma and Seattle) urban areas to mask escape was beneficial and the hijacker would have a better sense of his location. The longer he was on the plane, the success probability dropped. He would have a harder time identifying his location and the terrain became rougher. In his mind, the plane may even have gone over the Ocean. From an analytical standpoint there is no doubt that an early exit had the highest success probability. The take off delay doesn't really affect the LZ other than potential darkness. He wanted the stairs down on take off and was unable to get the stairs down in flight so the pilots had to slow the plane down, he got the stairs down and disappeared. The time delay between his planned DZ and actual exit may only be about 15 minutes or less?.. the longer he stays on the plane the more difficult it would be to identify his LZ, due to distance variability, he doesn't know the exact flightpath and his location. The closer he jumps to take off, the tighter the zone and his sense of his location..
I also believe that his journey down the stairs was more difficult than we tend to think, two chutes, dress shoes, money tied up and possibly a briefcase with the wind pushing up the stairs. They didn't lock down, they would have been pushed up violently by the airflow and spring action of the stairs. I think it was a very unexpected struggle to get to the end of the stairs that were not locked in the down position.
I find it improbable to believe that he jumped early or exactly where he had planned, he was delayed some but by how much past his planned LZ?
IMO, if I was planning this, I would have chosen an early exit based on terrain and ease of identifying where I was, had a car waiting and booked an escape back North through Tacoma and then Seattle... escape route the opposite direction.. nobody would be looking North of Seattle..
Then I would have gone to Vancouver BC briefly before heading home.. attended the Grey Cup and write a letter to the media disguising my hand writing claiming that the composite was untrue when it was actually very close.. then I would have spent all the money (that I didn't lose on the stairway which made it to TBAR via the Columbia) outside the US because I had a dispute and separation from my employer. Just what I would do, theoretically of course.
Oh, and pick up boxes of Count Chocula and the strawberry-flavored Franken Berry on the way, they weren't available in Canada..
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