Do you need to fully separate the fat from the meat? I've heard both ways. Been thinking of making my own some time.
I don’t worry about it. Then again, when I trim fat off a brisket or any other cut, I try to leave as much meat as possible on the cut. But, shite happens and I end up with some meat on the fat. I still go full speed ahead, and haven’t had a problem with shelf stability or flavor by having some meat on the fat. Just have to make sure it all renders down enough to get rid of as much moisture as possible, and after filtering it, and putting into its final vessel, letting it cool completely before putting a lid on it and sticking it in a cool dark place until needed.
All that said, I am a bit old school when it comes to processing and stuff. I do what I grew up watching and learning about and eating (with a few exceptions here and there, and I do experiment on occasion) so take all that with a grain of salt.
Some of the things I do may not be considered “safe practices”. But they have always worked for me.