I make 28 lbs at a time with 21MM casings in my #3.
I need 6 trays with 10-11 sticks per tray to fit these all in.
For this, I had to buy the optional side rail that includes 9 shelf guides and additional racks. I actually have 5 standard racks and 5 seafood racks. I use the five standard racks and one of my seafood racks.
Here is my latest documentation of my process:
http://smokinitforums.com/index.php?topic=4775.0Let me know if you have any questions.
I have made 112 pounds (4 batches of 28) in the past two weeks.