Well it's odd that no one else is posting definitive results. I wonder why? Here are mine. Maybe I did it wrong, but my quick appraisal is that this tek gives the very purest, clearest DMT crystals I've ever seen, yet the yield leaves much to be desired when the volumes are scaled up from the little ones others were talking about, and it is extremely difficult to collect all of the crystals.
I used 1kg of bark (yes, i know, that's a lot). I boiled it and filtered many times. Amazing how many times gunk starts forming. Anyway as per the tek I decided not to reduce too much as I wanted it to be very liquid. With the 2 gallons of liquid, I basified til it got dark as the tek said to do, using 100g lye (adding more lye did not change the color anymore). Left it in basement for 3 days. Came down and saw that no crystals formed. Decided to throw in a bunch more lye, probably way too much (altogether I used ~500g of lye). By the time I had swirled only 100g of those 500g into the liquid it was at ph 13+, and I saw the crystals forming all over the place! In a minute the entire thing was full of these crystals. I caught a few of them in a coffee filter and after washing, they were so incredibly clear, I knew I had never seen DMT this pure before. Not white, but clear. The only problem remaining was how to really harvest the crystals. The only thing I could think of was to pass the entire 2 gallons through a cotton filter. Unfortunately, though it seems crystals could not get through the filter (they were not found in the liquid coming out the other side), the filter at the end had definitely less than 2g of crystals, probably much less, as most of that 2g seemed to be bark or something. I ended up having to soak that stuff in acetone as the only way I could think of to get the spice out of it. The acetone is still drying (I didn't put it in the dehydrator, thought it would dry by itself but I was wrong I guess). But it can't possibly have much more than a 1g of spice in it.
I am now in the process of reducing all of the liquid with no crystals in it. I am going to get it down to a gunky consistency and then do acetone soaks til i get all the spice out. I'm thinking theoretically this tek should have worked perfectly. I don't understand where all the spice went, but I imagine that for some reason it is still in this liquid, as it could not have simply disappeared into thin air. I'll report final yields hopefully within a week.