I've been lingering in these forums for a few weeks and now I'm building my first offset smoker. I'm having a hard time deciding how I should make my door to the firebox. I'm thinking of welding the front plate on and cutting the door out. Or what it be better to frame the door in angle iron and make the whole front swing open? Does anybody have any suggestions? Also, would a sliding vent 4 x 7" long be okay for the intake, or should I make two smaller openings? The cooking chamber is a 24" x 48" air compressor tank. I used Feldon's BBQ calculator to determine the size of my firebox and chimney. If it wasn't for this website and all the nice people here, I would have never attempted this project.