You have studied this much closer than I have. I agree the acoustical data should be tossed out. If I remember correctly, the acoustical data came at the 11th hour. Did the photographic panel also form their conclusion at the 11th hour?
The HSCA quotes I used came from the HSCA Final Assassinations Report. I assume they sat down and discussed all the data they had for the final report, so it could be their hypothesis on Connally reactions and film blur results were gathered before the acoustic data was finalized. They way the wrote it up it sounded like they used the acoustic data to help justify the conclusions on the other data. If all they had was their opinions on Connally's reactions at z162 and film blur observations around z157, and no acoustic data, I assume their conclusions would still have been essentially the same.
And yes, that picture you added of your snipers window really helps. That looks good and helps me visualize what you are saying.
Thanks