That is a very interesting design. I will try to weld some of my own ideas with my powerimig when I get a chance. I like the holes you made for air intake.
I built mine a little different from the Video here, but when you burn Used Oil it makes a lot of Carbon when first start. But after about 15 Minutes or more or when over 450F+ Degree.... It burns really clean... It even clean out the Soot in the Chimney... We see Carbon Chunks flying all over the ground, LOL
