10 mg of those crystals smoked in a test tube vaporizer setup (includes tubes, and stuff, it's not just a test tube) produces very intense visual effects. It's enough to see reality repainting itself from scratch when you open your eyes. It’s enough for very intense closed eye visions. There’s no nausea at all, not even a hint of it. It's VERY STRONG.

It’s easy to get to that point if you start with a standard A/B using DCM, citric acid as the acid, sodium carbonate as the base, and do plenty of defats with DCM before freebasing. After the A/B you get an amber sticky sickening mix of alkaloids. Then you dissolve the sticky mess in MEK:heptane mix, decant the solvent leaving behind a bunch of crap, evaporate the solvent, and you get those nice crystals when it evaporates.

SWIM has done it many times. Anyone can do it.