It was actually my water pan, I didn't have anything disposable that was smaller, I'll definitely pick up some loaf pans for the future.
They tasted great, it was a new rub and glaze for me from "Project Smoke". The glaze had a touch of vanilla which I really liked. The ribs had just enough chew too.
It does seem like the hotter spots are towards the back, got more pull back on that end.
And I successfully didn't peek!