I have had my best luck with T-max iso100 in t-max-RS. T-max 100 has great reciprocity characteristics. I believe the stars are caused by the aperture blades of the lens. I like the contrast of nightshots which for me plays right into T-max's strengths. I should caution you, that I am not a big b&w shooter. I do shoot a lot at night and at dusk, but mostly with colour film.