Tim,
Remember she watched the parade from the front south east window, then she checked one door, banged on the next door, and then headed back up a corridor that if Oswald crossed she would be looking straight at him.
Her actual path around the corridor when she wasn't in a position to see Oswald cross was only part of one side of the building, with 1 door check and 1 door banging.
the walking part was likely under 10s, so she must have gone overboard on the door banging for your time frame to work.
Oswald would have to cross the corridor top part of the corridor after the 2nd floor lunch room encounter at around 100s to 120s past the shooting.
You also have to have Reid pass Oswald, go to her desk, watch him leave the area and then either leave again (un-testified exit, involving going around the counter etc) or have the both her Hine not see each other as Hine is crossing half the room back to front centre desk, where the phones were flashing.
Also Reid, the senior office staff, comes in and ignores the unmanned phone desk (that her staff are responsible for) with flashing calls that Hine sees from across the room and hurries back to.
Of course again my question in my previous past could have solved these issues, but they weren't asked.
Again why not have her time trial? Why not ask the people she said entered with Reid?
Two people say they both entered an empty office space? Hine testifies to scurrying back to answer the phone across the office to the front desks. I can dream up ways to squeeze the data to make sense but as they say here, "they wouldn't pass the pub test".