I have redosed after say 8 hours with excellent effects, while the impact will be very different from the added effect of taking that redose around T=0, I have found that it consolidates the trip and boosts the post-peak phase around plateau to comedown.
Do you know with acid when you take a hefty dose right away and be almost overwhelmed by the experience, meaning you have no time to integrate everything in live speed. I feel that is also when you get the biggest visual distortions.
But there is also that state with acid that comes when you are stable in the trip and caught up with it, then you are so meditative and feel so integrated that weird distortion visuals can disappear and everything just looks normal only super-intense and glowing gold. That is exactly the beautiful phase you can intensify by taking another 400 ug after going through the first phase, the diagnostic analytical but also way intense spiritual peak.
I've said this before and will say it again: LSD is such a promiscuous substrate for all these kinds of receptors I very much doubt that all of them will be downregulated or approaching a ceiling effect. Yes some do and that is what you can feel tops off the most apparent type of acid intensity. But there is another side to it that has a longer trajectory of receptor saturation, other receptors or other systems.
This is what seems logical to me and corresponds best with both my experiences, the different kinds of states and the dichotomy of people claiming there is no ceiling or saturation effect and those saying there is.
Is it not both there and not there?