Now that the wife bought me a meat grinder for x-mas and some jerky kits i'm now excited to make some snacksticks.I have read alot of threads on here about them but i'm still alittle confused and have some questions.First,what types of meats to use? and in what combinations,can i use beef and pork together?if so can i use ground chuck or buy some type of roast?Second,maybe third LOL, do i need to use pork trim or fat with this?Wife got me several differant stuffing tubes along with the ones that came with the grinder so whats the best size and casing to use? I was thinking the 19mm or 21mm something small they are the collagen is that the best to use for this? Any help or ideas would be great Thanks,les