Thanks for the reply. I figured as much, was just wondering if I was overlooking something simple. Just means adding the effect to each layer and mapping accordingly. Did realise that when I save an effect preset it saves the composition mapping I've assigned which is great as it means I don't need ...

Hi, In the past I've only used slices from the composition for mapping projects, but for a recent project I'm experimenting with using layers instead to reduce the size needed and craziness of the composition. I like to use composition effects for some simple things, namely brightness and contrast, ...