Unfortunately I don't have time to adapt to a 145rpm cadence (which is what I've timed Hoy at in video of his La Paz run). I need to consider cadences that allow me to complete the effort. I just drop to 450W after 45 seconds at 130rpm. I just can't do it w/out training.

At this point, all I can do is test and see. If a tall gear isn't hurting me at 250m, when will it hurt me? After 250m, it's not a tall gear any more.

It is disconcerting to see all the gearing standards used by everyone. I just don't see how those levels of spinning could work for me.