Ok, so I rolled 4 rolls of HP5, but I only have 2 dx coded canisters. So if I end up needing to use the other two rolls, my stupid Nikon will default to 100 and pull the film. So would it be best to try and compensate in the camera by underexposing two stops? Or would it be overexposing? I still get confused on that... or change the developing? Or just leave it as is to see what happens? Or shoot everything with a red filter to add contrast back that the pulling will lose?