Ok so we have been rained on for the last two weekends so I have not been able to work on the two drum smokers I have planed. I have all the parts exept for the parts for the air intake on the bottom. Should I go with 3/4 or 1 inch holes on the bottom should I drill 3 or 4 holes and when I drill the holes (this may sound like a dumb question) if I drill 3/4 do i just get 3/4 inch pipe and have them thread it same question with the 1 inch. what can I use to secure the pipe without welding. Also how long should the pipe be? Ok I know more than one question but I am tring for this to be as easy as a process as possible. Thanks in advance for the help.