Just bought a Master Forge smoker this weekend. I added 3-3/4" conduit nipples to the bottom tray with caps if/when needed. I also added a 3/4" nipple to the lid with cap. I will be modding the fire tray with a Weber 7440 grate for better removal of ash and better airflow. I did an initial burn with kingsford blue. Built in lid thermo peaked at 300 while a thermo hanging from the top rack showed 275-280 in the center. I have hickory chunk(lowes), mesquite chip(hd), and Apple chip(hd) waiting. I'm excited to try my first real smoke this weekend.