"I always have my facts straight.""...the Stemmons sign was about 70 yards from the TSBD entrance" You are something else.
Do you have information to the contrary?
Yes I do John.The Stemmons sign is barely 40 yards from the TSBD entrance.You don't have to look too hard to find a plan of Dealey Plaza. Get on it.
I did exactly that, using Don Roberdeau's map. That's where I got 70 yards.
Interesting.I used this and got a very different result