The logic is OK. Right or wrong, yes or no... the only way to tell is to go ahead and expose with the red filter, bracketing along the way. I would think EI200 would have been a better choice. Bracket and discover. It might be wasteful, sure, but you're guaranteed proof when otherwise it's mostly speculation here for people who have not used nor are familiar with exposure of Aerochrome. To this end, you are the expert on it!