To the best of my knowledge there are only two people who subscribe to the Western Flight Path--myself and R99.
Tom Kaye's site is a solid resource. However, it is worth noting that it is wrong in some areas--for example the Tena Bar money find spot. Also, I do not believe that Tom's discussion concerning the FBI Flight Path factors in the recent work that R99 conducted regarding the placard drift analysis which utilized updated--and much more accurate--placard weight and size data, as well as weather data (which Tom himself provided).
As I've asked many times before: How do those who subscribe to the FBI Flight Path rationalize the facts pertaining to the location of the placard find, the location of the fiberglass skirt find, the Tena Bar money find, the prevailing winds that night driving to the northeast, and other facts such as nothing has ever been found in the FBI search area or anywhere along the FBI Flight Path as would be expected (meaning to the NE of the FBI Flight Path)?
These are substantive matters of concern. If someone can plausibly answer the above questions I'm willing to listen.
Finally, I will say that I can respond to any question concerning the opposite argument. Meaning, I have what I believe to be rational explanations for the FBI Flight Path and how it came about, and the testimony of the Portland controller who apparently stated that 305 was actually east of the FBI Flight Path. Now I may be wrong with my respect to my theories on these matters, although I suspect I am not.