So, I have the suppliments at hand. Since a lot has been said here as to why this works, I want to make sure that the above is the distilled essence of the technique.
Yes, that is pretty much it. Keep in mind that dosages of the B's can be played around with, i'd recommend starting out at 25mgs of P5P and if you don't feel it decarboxylate the Tryptophan to Tryptamine then increase it to say 50mgs, or 100mgs, shouldn't need much imo.
The B12 is the most important for Tryptamine to NMT/DMT methylation (and thus for SAM), so if 500mcgs to 1mg to 5mgs to 10mgs doesn't do it for you, don't be afraid to go higher, take as much B12 as you need to get the job done, ime (and that of others, like those at the B12 Deficiency subreddit) you can't have "too much" B12, the issue is not having enough, and those at the B12 Deficiency subreddit are big advocates of B12 injections for correction of B12 deficiency and they typically go for at least 1mg's worth and to get that much through oral consumption you'd need to take 100mgs of oral B12 to give you approx 1% absorption through passive digestion which would give you approx 1mg, so oral B12 is not the same in potency/bioavailability as injections are, so to get to higher B12 levels with oral consumption, higher/heavier dosages are necessary, but for this purpose, imo, 10mgs to 30mgs to 50mgs to 60mgs up to 100mgs should be more than enough.
It's also worth keeping in mind that lots of folks are B12 deficient these days, and so correction of B12 deficiency is likely going to be helpful for this little method, and so people should be sure to factor into account that people may be low in B12 already and it may take a bit of supplementation or injection to get levels up enough for this to be effective, i don't know that for sure but imo this should work from the get go, maybe, but if not, then the goal is to get SAM levels increased by way of correction of B12 deficiency (and Folate deficiency, if present) so that you get your SAM so that you get your NMT/DMT.
And if you feel like you need it, try taking 400 to 600mcgs of Folinic Acid (1 half to a little over a half of an 800mcg Folinic Acid tablet, for example), though Folinic Acid is a bit delayed in it's Methylfolate delivery ime so may be best to take it earlier in the day or a few hours before, or some pure Methylfolate ime/imo would be ideal), as the methyl group from Folate is given to B12 to give to Homocysteine for recycling it to Methionine for SAM, but assuming one doesn't have Folate deficiency, just work on B12 and SAM levels and you should be good to go.
Regardless though, even if one is lacking in SAM, one should still feel Tryptamine from Tryptophan decarboxylation since Tryptophan doesn't require methylation to turn into Tryptamine, only decarboxylation, hence the B6. So if you don't have enough SAM present, you will still feel the Tryptamine, and as such, if you feel the Tryptamine but it lacks a "methylated" feeling, take more B12 (or B12 and Folate/Methylfolate) to further boost SAM levels and then you will feel the Tryptamine be methylated to NMT and then to DMT.
And remember, ideally, take the Harmalas first, wait 1 hour, then take the Tryptophan+B6+B12. Or whichever timing works for you for fully effective oral DMT activation, that's the time to take the Tryptophan+B6+B12.
If it doesn't work, don't get discouraged and don't give up so easily, work for it, and you will reap the benefits. Report back here regardless, but if it doesn't work, lmk, we'll figure it out.