Tried using ground raw meat to make linked sausages and it's pretty much worked once after testing it for 20 minutes. Did it both with a) an custom modpack and b) with just the mod, on its own, in a different installation. Here are the steps I'm taking:

1. Place a grinder down
2. Add an extruder tip
3. Place a casing on it
4. Add the ground raw meat to the grinder
5. Right click to grind (nothing happens here, though once, after switching sides, the machine successfully output a linked sausage item. This has not happened again, no matter what angle I go at it from).

Loving the rest of the mod so far though! Thanks for the hard work, y'all are doing great!

Was being a silly goose; grinders require 8 ground meat to produce sausages