Roger & Mike,

yes, I am aware of inter negatives and RA4 as alternative to Ilfochrome, and it is most certainly something I should look at when I finally run out of Ilfochrome materials. The challenge I see with this is finding a negative film which doesn't have too much character of its own. I'm especially concerned about the color palette of Portra and Ektar, and Fuji will most likely quit C41 long before they quit E6.