About your ingredients.
Is there a set amount to place in the bowl, or just play it by ear?
Yup, mix to taste, never followed a recipe other than a hint to the ingredients in my life.The brown sugar in the mix helps put a slight glaze to the outer fat and meat and you realy don’t taste it in the final product.Key to the mix is the brown mustard, I have used it all by itself and it does a good job.