[Plums]

I know Phil isn't using giggle gas, so this doesn't apply to him.

Using NOS after half track (or in the higher gears) is pretty much a waste of time. Granted it will drop your ET by a small margin, the only real improvement will be in trap speed (which means virtually nothing)... You would be much better off using it to half track then switching it off (though it's better to just leave it on).