The sausage looks real good. personaly i have never used collegen casings, but it depends on what a person likes. With natural casings you can twist the links, where in collegen you cant. i know a few guys who use collegen casings for beef or venison sticks but not for sausage links [especialy fresh]. Again it's personal preference as far as casings. Before i got my smoker i "cooked" my kielbasa or any other sausage in the oven [with cure]. I set the temp at 225 deg and kept it at that temp the whole time and the sausage had great color and was done with good results. I had very little to almost no leakage from the casings. I think that was because i used one cup of dry milk as a binder per 5 pounds of meat mix. I use this in fresh and smoked sausage.
As far as the smoker i also do the slow temp rise now after learning that method on this forum. Primarily for additional drying during the first hour or so with no smoke and then smoke during half the cooking time until finishing the sausage off at around 200 deg. I have learned where my hot spots are in my electric smoker [Masterbuilt 30 inch digital] so i arrange the sausage accordingly and rotate half way through. When i opperated a commercial smoker in my working days the smoker was set up to gradualy rise temps to a final temp of 225 and then had a automatic cold water rinse when done. The smoke was automaticly loaded with very small wood chips as i recal [also for half the time in the smoking proccess]. It's a lot more fun with a smoker at home. Reinhard
As far as the smoker i also do the slow temp rise now after learning that method on this forum. Primarily for additional drying during the first hour or so with no smoke and then smoke during half the cooking time until finishing the sausage off at around 200 deg. I have learned where my hot spots are in my electric smoker [Masterbuilt 30 inch digital] so i arrange the sausage accordingly and rotate half way through. When i opperated a commercial smoker in my working days the smoker was set up to gradualy rise temps to a final temp of 225 and then had a automatic cold water rinse when done. The smoke was automaticly loaded with very small wood chips as i recal [also for half the time in the smoking proccess]. It's a lot more fun with a smoker at home. Reinhard