@MartinSojka Yes. Well, not the fluix automation, that works fine. It's the 'keep some pure crystals around, and some of each dust too' that did it, which I dismantled.
So I've got the seeds in droppers hooked up to a button, if I need any, I just press it a few times.
The mistake was, don't trigger a macerator with a level emitter.
You may have 2k certus dust on hand, AE2 derps and reports 0, the emitter closes the EU split cable, the macerator turns on, and it's a stack turned into dust before you (or it) notices the mistake.