I have a 1" ball on my UDS and added the big belly mod. It is really easy to turn.
But the other nipples on the drum are used to help establish draft and help with getting the drum up to temp.
Just make sure you watch the rising temp so you can start closing the other nipples when you get close to your target temp! It is much easier to catch the temp on the way up rather then trying to bring it back down.
