A reconstruction? Involving whom? Did LHO participate? And based on what? An eyewitness? When did LHO arrive in the lunchroom? When was his last visit to the Men's Room?
Easily possible does not equate to proof positive, and I stand by my conclusion about said timing.
A man of similar age and build, in a building of the same design traveling the same distance at a steady pass. The man completed it easily and was not at all breathless. It is not proof positive, and I never claimed it was. This addresses the point of a problem with the timings, which was what was posted. You may stand by your conclusion (I think you raised a concern but didn't actually state a conclusion) but you haven't answered my question which was 'On what do you base your concerns?'