I'm positive you can redose but the trick is that you should take a little extra but not so much that it will be overwhelming. It's a little hard to get right and I would just recommend you try it for yourself, start low-ish with your redose then try it higher the next time BUT adjust for changed factors.
A changed factor would be the change in initial dose (a higher initial dose might get you more acute tolerance so you would need even more to redose) and a change in timing. The later you redose the less likely it is it really creates another peak or plateau. The best idea is to extend the plateau so anticipate the ending of the plateau and dose at least an hour before you expect that.
My theory is that when I first take the premise that trips have a number of phases: comeup, peak/plateau, comedown etc.. my idea is that you cannot go back a phase, only forward. It IS possible though but it requires a bigger push to get there. And it still often feels like you are on a tangent, only intense. The meaning of the timeline or story-telling of the trip does not change from that.
I hope that makes sense. This whole thing is hard to predict anyway, maybe I try to get a grip on something that can go either way in the end.
Someone recently wrote that taking moclobemide extends a mushroom trip by a few hours, so it could very well be that works for 4-AcO-DMT as well! I can't think of a reason why that would be a dangerous idea but be especially apprehensive when combining pharmaceuticals like MAOIs (e.g. moclobemide / aurorix) with drugs that are not commonly combined with them. And the only ones that seem more or less common seem to be DMT, or DMT containing plants and mushrooms.
