@axwell Okay, so with using vinegar you DONT produce HCl!!! You can make a salt out of the freebase that is called acetate. The acetate can be used for the same purposes the HCl salt is good for: Snorting or plugging.  1. First of all you want to know how much HCl equivalent acetate you need. That goes like Freebase [g] x 1,167 = HCl equivalent mass [g]. So for instance if you want to plug 15mg of HCl and all you have is the freebase you use that equation above with a little algebra like: 15mg / 1,167 = 12,85mg. Which means you need ~13mg of freebase converted into a salt to produce "the same" effects as if you directly plug 15mg of HCl because the freebase molecules are not as heavy as the HCl ones. 2. It doesnt matter at all that you dont produce HCl with this reaction for the equation to still be right. But: Of course the Acetate will be even heavier than the freebase and the HCl: Freebase x 1,167 = HCl and Freebase x 1,27 = Acetate. So dont be surprised that you might end up with almost 16,3mg of 5-Meo-DMT-Acetate when you just wanted to plug 15mg of HCl and even used 13mg of freebase. It is the same amount of molecules and hence equals the same dosage. 3. You put the amount of the substance that you weighed out on a spoon and fill a needleless syringe with less than 1ml of vinegar (25% acetic acid; it is called "Essig Essenz" here in Germany and is used to clean pipes or old coins or whatever... Im sure you can buy it in every supermarket) 4. Five to ten drops of vinegar should be enough. You have to drop them onto the substance on the spoon. The substance should solve in the same way as the HCl usually solves in water. If you have a clear and transparent solution, ideally all the freebase molecules have successfully reacted with the acid in the vinegar and now have formed 5-MeO-DMT-Acetate 5. You dont have to worry that the excess acid might damage your butt because you just used 10 drops of it. And you dont really need to calculate the needed volume of acetic acid with any stochiometry. I mean you can but that is rather an issue if you want to snort it 6. You clean the syringe you had just used the vinegar with. Now fill it with about 1ml of water which you can put onto the spoon with the 5-MeO-DMT-Acetate you just made.  7. Stir well and soak the whole solution up the syringe and it is ready for plugging. (8. I havent tried it personally, but you should also be able to let the excess water evaporate if you want to snort it. Then you should of course skip step 6 and use the vinegar very sparingly...)   Hope this will help you