ID-11 is essentially the same as D76 from everything I've read. I'm amazed that yours was still good. My D76 gets weird after 3-4 weeks! I've tried everything. Distilled water only, glass bottles w/ marbles, gas in the bottle before I cap it, you name it. That's all I get, and then I start getting more grain, and it is not predictable at all. Now I use TD-16 and we'll see how that works for the longer storage. I do agree that the developers we're discussing are just fantastic for Tri-X.