@dennishoddy It depends on what type of casing you are using, if you are using cellulose casings then you probably will need to either tie them or use hogs rings, tying them would be my suggestion there. If you are using natural casings like sheep or hogs then you shouldn’t need to use anything at all, they should stay twisted once done. If you are using collagen casings then you can twist them but once you cut them they casing will come open a little, you could tie these if you want but I generally don’t, as long as collagen casings are cooked at the correct temperature they should expand too much past the casing. For a good example of how to twist casings go to the 4:35 mark of this video https://www.youtube.com/watch?v=q_FgktFx4Xg Austin is twisting cellulose casings here but it shows how to twist. Let us know if you need anything else!

@dennishoddy The best answer would be to just use a smaller stuffing tube, or use a larger casing that fits better on your stuffing tube. Using fat would be better than vegetable oil, but still the best answer is to match up the stuffing tube and casings for a better fit.

@dennishoddy You could either use a cover brine, or you could inject the tenderloins with a brine and cure. I’d recommend using the Country Brown Sugar Cure and it is definitely the most popular one to use too. That is a ham cure as well. If you do want to try a bacon cure, the most popular bacon cure is Blue Ribbon Maple Bacon. If you want to use a cover brine, just use 1lb of cure per 1 gallon of water to submerge and soak the tenderloin for 3-4 days in the refrigerator. At the end of 3-4 days, remove from the brine, rinse, and then you can proceed with smoking. Or, you could inject the loins. With injecting, you would want to use 2 lb of Country Brown Cure per 1 gallon of water. You can inject 10% of the total weight of the meat into loins with the cure solution. So if you have 10 lb of tenderloin, inject them with 1 lb of water mixed with 3.2 ounces of cure. After injecting, simply hold overnight in the fridge and then you can smoke and cook it the next day. You should be fine to use the same process for either the ham or bacon cure. Let us know if you have any more questions we can help with!