Hey Jake,
I remember your original thread and your descriptions were really good, I also remember Daniel confirming you'd likely been hitting Equanitmity.
Suddenly their was something like a soundless crack or the negative inversion of a flashbulb, and all that noise, all the clutter of thought went away.
Sounds promising...
It was like a system reboot, or wiping all the dust off of a wooden table so that is shines with a polish.
Even more promising, and a nice analogy too.
Clarity of thought and precision of focus stood in the place of cluttered and fearful skittering mind activity, and then there was just the spaciousness of the visualizations of lights receding, something like multicolored clouds passing quickly away
.
Nice, sounds familiar and so...
I can't be 100% but it does sound likely, and a few other things you mention also lead me to suspect you've experience fruition.
I didn't notice a hard break in my apprehension of sensations or thoughts other than the infinitesimal blip, but I have noticed that there is more "space" between my immediate perceptions and thinking and what I'll call, for lack of a better way of saying it, awareness.
Interesting that you mention this newfound spaciousness 'cause that's the first thing that I noticed after hitting Path, it's quite distinctive and what you've described here also sounds familiar in my experience.
And this is very different than when I first began practicing, but I can't say that it is tied directly to the experience of that particular moment.
Yeah, I can understand why you'd say that. It's like you immediately realize that it's never been any other way, it seems like you were always aware of 'this' but just didn't notice it or something? Would that be another way of saying it?
And, to be fair, I experienced something similar a few weeks before this time. But I got lightly stoned before reclining, so I took it with a grain of salt. While stoned, the negative flash was much more intense. This latter time, it was remarkable more for the fact that before skittering messy thoughts, after not; it swept away the clutter from awareness, cleared the gunk from the mind.
Are you sure it was the same sort of "negative flash"?
Did you notice any perceptual changes in the way you did with this recent "blip"?
I take a smoke too so don't be afraid to get into insight practice while stoned, depending on what you've been smoking it can help concentration or even make perception of mental sensation much clearer. The downside is that it can just as easily lead to torpor, cloudiness and phasing out unless you've got your mental chops together and can utilize it effectively, which is a skill worth learning.

I recall a similar sort of progress from when I experience anicca directly and when I hit Path, the same sort of timescale of a few weeks. The initial realization changed
something in my understanding of the world, it cleared away something from the mind in the same sort of way you describe, but it was only when that first clear fruition happened that it became an experiential rather than intellectual understanding. Interesting, I'd actually forgotten about that.
I suppose the best advice is the old classic: Wait and see.
Look at what's changed in your experience, how you relate to the world now and how you understand philosophical paradoxes in light of this perceptual shift. Is there a change in your ideas or experience of "you" as a separate, independently existing entity?
Give it some time, do some reality-testing and see how these realizations stand up to close examination. I suspect that you've probably gotten Path, but again I can't be 100% for numerous reasons not limited to the fact we're communicating on a forum online.