I've done little sperimentation with d. stramonium too. Never gone up to 8 seeds, although how the content vary from seed to seed is something annoying. I've taken 3 seeds one, and had strong vivid dream, and with 7, 2 days ago, had nothing. Maybe the compound is degradeting, do you know how fast do the seeds lose their actity?

My plants have just made out other fruits, by the way, so in this days I'll try out some freshes =)

I also use in combo with melatonin, but didn't achieve nice results. I just have to practice more, I guess =)