I'm looking for max t.o. weight for Estes D-12-0 vs E-12-0. It looks like the E-12 has just a bit more punch but I've heard rumors otherwise. I know the E has a longer burn time but is the initial kick higher? I also noticed that the thrust of both are all over the map with different ejection charge times, which frankly makes no sense to me. So what's the real deal ???