I have always used natural casings to make my sausage and between links you just make a few twists and this is sufficient to separate the links. Last night I used 32mm collagen casing for the first time to prepare sausage for smoking. When the links were the length that I wanted, I tried twisting to separate the links and it ended up untwisting. I finally just tied a piece of string between the links. This was very time consuming. This will be the last time I collagen casing for this type of sausage unless somebody knows of a trick to separate the links. Any suggestions from the sausage experts out there ? I will post pics later of the product after smoking later today.