why not take the opportunity to try FASA? it doesnt have to specifically be fumaric acid however, i forget which other ones, pretty sure its in one of the FASA/FASI threads, but theres other, more common, acids you can use that will form a DMT salt that immediately crashes out of a NP solvent upon addition of acetone or isopropanol that has been saturated with as much of the given acid as it can hold. I think ascorbic acid (vitamin C) is one of them, regardless of if it is, ascorbate can be smoked directly. citric acid too though im pretty sure its really hygroscopic so it might not be practical without molecular sieves and a dessicator. odds are your local brew shop will have something. it was either speculated or confirmed, tartaric acid may work too, which is available at any supermarket. It is worth digging into, FASA will work with many acids, saturating many solvents.
after filtering and drying, you then dissolve in a very small amount of clean water and add some carbonate solution, and basify the carboxylic DMT salt back to the freebase we know and love.
the great thing is it fits right into an existing tek, you just use something like toluene, xylene, limonene perhaps, or another NPS that dissolves DMT too well to crystalize from, but will happily extract at room temp, in place of naptha. And instead of freeze precip or evap, you dry it (magnesium sulfate) then filter and add fumaric acid saturated acetone, which also must be dry similarly.
you can use exotic or low volatility solvents here too and just wash them out after you collect your DMT fumarate crystals. the acetone will wash out with water, as will IPA. the solvent can be re-used so much.
Later you dissolve the fumarate in a small volume of water and drip in some sodium or potassium carbonate.
That milky DMT freebase milk in the video eventually forms large clean crystals, which someone has documented and put up in the wiki.
another important aspect is that once you have your DMT fumarate, it is insanely stable in that form, kept dry and refrigerated it will last decades iirc. so if you are doing a bigger batch than youl consume for a good long while, you only have to freebase what you intend to use.
since FASA works with limonene, you can do your entire process start to finish using food-safe chemicals, or house-safe solvents, this was a remark someone made that stuck with me.