(Slaps hand to forehead) DOH!! I forgot the rinse cycle!
Vman, if you're doing enough to store for later consumption, and you don't want your casings to shrivel up, you'll want to give them a 5 minute cold water shower right after you finish smoking them. That will quickly set the fat back up as a solid, which prevents the sausage from shrinking, which prevents the casings from shriveling.
The target temp is 90F at the core, but 5 minutes in a cold shower (tossing them around from time to time so they all get cooled evenly) is usually enough. That's what I do whenever I make bockwurst, hot dogs, vienna sausage, or anything that needs pre-cooking or smoking.
Hey, Joe: nice looking sausages! Got me thinking I should probably make a few pounds of hot dogs this weekend. If I do, I'll post some food porn for you guys!
--Thom