Hello, I recently bought a bulk roll of Agfa Apx400 (exp. date 03/2014). I bought it cause I need a 400 film. I read I should expose it at 200 to get the best result, loosing the speed. Is it really bad if I expose it at 400 or 320 and develop in Rodinal, say at 1:50? Or should I use another developer, like Rodinal special? Any advice about dev times, E.I and developers appreciated. Thanks L.