Thank you for the response,
The reason I need to go to 16 bit, is because AE can only export 8 or 16 bit, otherwise I need a Kona or Blackmagic card to export 10bit uncompressed. In terms of an HD card, I don’t have that, but it seems more and more likely that I will have to investigate a solution here. The amount of HD editing will be so minute that I don’t think an HD card is necessary for this project. It’s only 100 feet of film.