Imho u shouldn't really have to follow a tek. Before you attempt an extraction you should make sure you understand the reason for every step. It's really not that hard and patience is a virtue.
These are the steps for a basic a/b extraction
First you have to get the dmt out of the mimosa. This goes quicker in a warm acidic enviroment. So if for example you wanted to extract 100 grams i would boil them 3 times for 2-4 hours in 2 liter water and 1 liter vinegar (these are large amounts of water because i like to make sure i get everything) . Then you filter and combine all the (normally reddish) water and reduce the 9 liters down to 1 liter.
DMT naturally occurs as a salt. However, as a salt it will not disolve in your apolar solvent (naptha) so we need to convert it to a freebase (free - base) molecule. Only thing we have to is adjust our ph. it should be close to 12. this can easily be done by using sodium hydroxide or any other base like sodium bicarbonate (thats a weak base tough).
After adding enough base, the dmt will easily disolve in a apolar solvent. This is your naptha/limone/most other pure apolar hydrocarbons are ok. add 1/3 solvent to your total volume of water, and shake it gently for 10-15 minutes then seperate the upper layer from the bottom. Again do this 3 times and combine your solvents, then you let it evap with a fan at room temperate untill you see little white crystals forming. Then put it in the freezer overnight, quickly take it out and pour of your solvent, the crystals will remain and then you airdry the remaining solvent
If you used enough base this method should have 100% succes rate. if you have any questions i'll do my best to answer them

Good luck with your hyperspace travels.