I measured the clearance from the bottom of the wood box to the 009 floor it is only about 1/8" to a 1/4". I noticed the bracket around the heating element is slightly off level. I tried to straighten but with no success.
The one sugestion I have is make sure the 009 is level ground or close to level if it is off the drippings migrate and do not drain through the drip hole. GOOD LUCK!!