1st cook on new UDS. 80 degrees outside with steady breeze. Cut lip off top of drum (good cut) for weber kettle to fit. Using Royal Oak, firebox is 18" weber coal grate with expanded metal, 2'' below, 10 inch above. Four 3/4" nipples with one ball valve. Lit coal with weed burner, let it get to 225 and sit there for about 20 min., added a couple pieces of hickory chunks, put my shoulder in and for the 1st hour sat at 225 (maverick gauge) then temps took off up to 350 plus in a matter of minutes. I pulled the shoulder off waiting for temps to drop then I will start again. Should I have let it burn wide open for a while and then shut it down and wait for temps to drop and stablize? Yester day on test burn I had hot temps for a couple of hours then I got it down and it sat 225-225 until midnight before I shut it down (9 hrs.)