I use Curlys seasonings and just grind the pork butt and let it sit overnight. The next day I stuff them and cold smoke. I add pink cure because of the cold smoking. My favorite are the Old Fashion hot dogs and the Polish. I stuff them into brat size casings. I really don’t care much for actual Brats but prefer the spice of the old fashion and polish.
I tried to get a link to his website and I guess he has retired. The next best guess would be P & S seasonings. I had heard rumors the Curlys was just repackaged P & S seasonings but don’t know for sure.