".........SHOULD be accurate enough". ?
This is why this case remains unsolved after 62+ years.
research standards being passed off as "Dead-on balls accurate". ** "My Cousin Vinny" (1992)
The case was solved 12 hours after JFK was killed. For some reason, it still baffles some people.
It doesn't surprise me that you think recreating a virtual Dealey Plaza EXACTLY as it was in 1963 is something that needs to be pursued. If you need such a thing to figure out who killed JFK, you're SOL. But we already knew that.