Originally Posted by whitelightnin92
In the process of uploading picture. I have three holes in the bottom of the drum for air. I have two 3/4 holes, one with a nipple and one with a ball valve. The third is 2 inch with a 18 inch riser and a ball valve. I'm currently using a kingsford kettle lid and the ventilation I have on top is the circle vent that comes standard with the lid. I tried in vain to set the temps. I had it at a steady 235 when I threw the butt on, but it spiked and fell so much that I never really got it to stabilize again.
Any particular reason for the 2" ball valve ? Seems like it would be harder to control air inlet with a valve that big. Try shutting it off and use the 3/4" for air inlet control. I have the KISS UDS with 3 ea 3/4" nipples and a ball valve on 1 and have no problems maintaing temp. Don't give up on the UDS.