I said 2mph as a general example because it was an even number which was easier to divide from 8 mph. But thje basic point is valid. you can take out frames and keep the limo speed consistent. If you didn't have an even number the the edit would be slightly off.
To Allen, The piece of skull flap I mentioned is part of the 'official' record. There are drawings and photographs of it from the autopsy. I am not saying there really was a flap, I am saying the flap they claim is,I think, visible in the Z frame. If it is fake it is fake and the one we see in the Z film was added. But either that bright spot is supposed to be it.