There's been a lot of debate on the drill/no drill to use pellets or sawdust. I have the SI1 model (wish i bought bigger!!!) and do bacon twice a year with a cold smoke using dust. I have found an easy, and non-permanent, way to get enough air flow...masking tape!! After drying out the dust in the microwave for a few minutes, I light it with a blow torch in the
amazen. I remove the smoke box and lay it on top of the element over the hole (element is off of course). I then close the door, but leave it open just a crack. I secure with a couple pieces of masking tape. This allows just enough air to circulate through and keep the dust going. Has been working very well for me. I did this because I didn't want to drill into the smoker and modify it permanently. Hopefully this helps other people!