I found a recipe in a book for a coffee flavored porter. I 'tweaked' the recipe somewhat by using a different yeast, coffee variety and method of fermentation. I have given it out to friends to try, and am getting tremendous feedback including two people who suggested that I enter it in a contest. I've never competed in a beer judging before, and don't know if I would be eligible since the base of this recipe has already been published. The recipe for the porter itself is pretty straightforward in my years of brewing. It's the addition of the coffee and a couple other ingredients that make it unique. Anybody know if I'd be plagiarizing to enter this beer in a contest? I'm in California if that makes any difference.