Going to do a 30 gallon with domed lid for camping, etc. I did a 55 gal with 4-3/4" pipes and it works fine. http://www.smokingmeatforums.com/t/169956/1st-uds What do most people run in 30 gal drums for intakes? And it sounds like the grates fit pretty tight so the grill bolts don't have to be too long. Planning on 2 cooking grates. Was planning on a weber charcoal grate/expanded metal charcoal basket 12" high with a pizza pan attached for ashes. Any other tips?