SWIM uses 5-MeO-DMT fumarate. The pure stuff had something else and it that burned his mouth. He freebased it and made 5-MeO-DMT fumarate out of it.
SWIM doesn't like smoking anything. If an alkaloid is active sublingually, he prefers that route, especially if its more potent than oral use, and 5-MeO-DMT is way more potent sublingually than orally.
SWIM has smoked 5-MeO-DMT on its own and doesn’t like it that way at all. I don’t recall him ever using harmalas with it smoked. One time he accidentally smoked about 40 mg of 5-MeO-DMT thinking it was DMT, and it was a horrible experience. Since then SWIM doesn’t smoke it anymore. There’s no point. It’s nearly as active sublingually (about 2 times the dose is needed), the effects are nicer, they last about 2-3 times longer and it’s easier to judge the dosage.
SWIM has sublingual 5-MeO-DMT fumarate windowpane that he made. This is what he uses. It’s portable, and no one things you’re using drugs when they see you eat it.