Hi Joe, looks like you had a lot of fun last weekend, especially with the sheep casings. Those look like the are 20-22 and better suited for snack sticks like kabanosy. Working with sheep casings can be frustrating. I know that the first time I used them I just wnted to sit down and cry.

First I got the whole hank tangled up, and then there was no way that I could get them on my stuffing horn. And they are not as strong as hog casings, but with a bit of practice you will stuff without ant blooeys. And the best size for franks is 24-26.
Brats look great, and it's best to play around with the pieces until you find one that you like. As to lemon zest, if you don't have any on hand, use a few drops of lemon extract, works like a charm!
Looking forward to seeing your next project!