I don't really understand the procedure you're suggesting, but if you want to extract DMT using only calcium hydroxide and ethanol, it's possible, but would be a bit messy and possibly result in a lower yield. You can simply powder the bark, mix it with calcium hydroxide, make a moist paste, mix it really well, and let it dry as much as possible. Once it's dry, you can add ethanol, mix it up and pour it off. That's the messy part because the bark powder comes along with the alcohol and it's difficult to pour it off without getting any bark material. I had to use coffee filters but that just makes it all even messier. French press could do better, but the powder is fine (as it should be) and would easily pass through the mesh. One way to make sure you get all the goodies would be to do several pulls, each time pouring off only what you easily can. You'll end up having to use a large amount of alcohol though...
One possible alternative, which I haven't tried myself, would be to salt out the freebase from the ethanol solution. Benzoic, fumaric, or possibly citric acid could do the job. After salting you could use the same ethanol again for the next pull. I use this method with naphtha, with around a 100-150ml I can finish an entire extraction, pulling, salting out, and using the same naphtha for the next 10 or so pulls until nothing precipitates on salting.
