Just finished building my smoker which took about 6 to 7 months to build. It has two tacks with the heating element in the bottom back. About a week or two I smoked my first pork shoulder and st Louis ribs. Need some suggestions on how to keep fire going and how to raise temperature, which on my test run got to 225 to 250. I know I have to add a intake valve for oxygen. But need some suggestions on whether or not to use logs of wood or the chunks I brought.