I cut the bottom of the 15 gallon drum off about an inch below the bottom ring and it fit very nice in the Smokey Joe base. I added the latches to give me peace of mind that the drum would stay upright when checking the meat.
I did not paint the inside just cleaned it up nicely.
The last smoke I did on it, I used lump coal and it stayed at 260° for 8+ hours. I pulled the pork off at 7.5 hours. I didn't have to move the vents or tap off the coals once. Very pleased.