I have smoked 27 lbs of venison summer sausage in my PK100. Used the 40 mm x 18 in Collagen Casings. I just put two racks in the top position and ran chop sticks thru the casing loops. Came out fantastic. I like the smaller 1lb. Tubes because I give them to a lot of friends. They are also about the perfect size for ritz crackers when sliced. I do have some friends that eat these one pounders like they are snack sticks. I used Waltons Ton Summer Unit seasoning, outstanding.