Hi emc, I have little experience in this, and you've been doing this a lot longer than me, but I feel like blabbing.
I remember one AYP lesson (no memory of which one), which was about ecstatic conductivity, in which he replied to somebody that if they ceased practices entirely, their ecstatic conductivity would remain at its current levels. That's obviously taken totally out of context, but thought it was pertinent.
Who knows for certain? It's been said elsewhere that meditation practice cleanses lifetimes of built up karmic resistances. So it would be difficult to undo your progress in one lifetime! I don't believe in the reincarnation part of it. But I do believe that lifetimes worth of karma can be passed from parents to child in the formative years.
Spinning, spinning. Ask yourself truly, has your journey ever stopped? In many ways I feel AYP practices have softened the transformation that was already happening in me. Practices have spread the process out over a manageable daily dose, rather than lurching forward in huge, world shattering energetic breakthroughs every few months or years. Who's to say one way is faster or better? Tantra is after all, more vast and all encompassing than the entirely of yoga, as Yogani has said.
When we get down to the hard facts, in AYP we are sitting still and repeating a thought over and over again, jamming our tongues into our nasal cavities, crossing our eyes, squeezing our sphincter, drinking our urine, and holding our orgasms in (have I forgot anything?) all in the quest to find something which can't be explained by words, and is already here under our noses! It is quite silly! We're all mad! If the AYP training wheels do not some day come off, I will be truly disappointed. Surely for the righteous soul that desires truth, there is another path which is born out of seeking itself. Sometimes I wonder if I have not landed here because I was too cowardly to walk those steps of my own path.
I took one break, just short of a week. My kundalini remained active as if I were still practicing. I felt it was calling me back in a way. I hope somewhere in all that I said at least one useful thing.
Peace.