I usually shoot 35mm Tri-X 400 pushed to 1600iso with my GR1v. The GR only goes to shutter speed of 1/500th so I use an orange or 2 stop ND filter during the day. I develop with ID-11 (1+1) for 13 1/4 mins. I really like the grain it gives me. We've been having good weather here in Tokyo and I was planning to head down to the beach for the weekend. I am now wondering if I should be using a different film or just rate it slower. I've shot it at 400 ISO with flash indoors before with mixed results. I know that trying it out is the best way to figure this out, but I any suggestions would be appreciated. Thanks!