Bill,
I like the part where you point out that fibers matching the shirt Oswald was arrested in were found in the jacket discovered under the car at the gas station, the fact that Earlene Roberts said Oswald zipped up his "short coat" when he left -- i.e., his brownish-red (or reddish-brown?) button-up long-sleeved shirt couldn't have been confused with his zip-up jacket or vice-versa -- and the fact that it makes perfect sense that Oswald, having killed Tippit a couple of minutes earlier, would jettison his jacket at or behind the gas station in an attempt to alter his appearance.
I also like the fact that witnesses' conflicting descriptions of the direction Oswald was walking before Tippit stopped him can be explained by the following scenario:
He had a still-valid bus transfer and he hoped to catch a bus to the VA Hospital (and from there a Greyhound bus to Laredo) and therefore he walked past 10th and Patton towards the bus stop on Marsalis until he came around a curve in the road and saw a County Police car parked a block away, so he turned around and started walking back towards 10th and Patton for his unexpected rendezvous with Officer Tippit.
-- Tom