I'm sure this will (understandably of course) make a sausage maker groan, but what I do is just buy Eckrich Smoked sausage, 42oz pkg and put them on at 240 for 3-4 hours, sometimes a little longer. In an analog I would use 225 for same period of time. They always come out great and melt in your mouth.
Compared to making your own I am sure it is like they say about bacon, after you do it once, you will never go back to store bought, but since your like me and have no sausage making tools, I take the easy route.