Yeah that was the first thing I noted - it's copper, not steel alloy.
Anyway, on topic - my best results for smoking DMT were actually sandwiched between fresh weed in a cone, smoked through a bong. I can't really say dosage as it was eyeballed lol, so neither can I really comment on whether it "felt" as intense as the amount used should feel so who knows if it were efficient, however I'd guess it was 30-40mg max.
Weed in the bottom of the cone was pressed in fairly tight, leaving only a small crater in the top to place the DMT. On top of the DMT I pressed a little more weed, ensuring to insulate/buffer the DMT. When I lit the cone, I made sure to keep the flame as far away from the material as possible, and to only hold it there long enough for the weed to catch. From there I inhaled VERY slowly and steadily, so as to not burn the DMT or pull it through too quickly as waste it. Inhale the entire cone in one long slow pull, and hold it until the sudden sensation that I don't actually have anything in my lungs to exhale (this is the first sign of body load for me). Then exhale.
My 2c