Working with Silver Wing

After working with Silver Wing for a majority of the day yesterday, he's expressed some/plenty of interest in joining FiMFiction in order to post his story's perspective, as we both have enjoyed this challenge of writing from our own limited perspectives. As much as I love this idea, I've sadly had the impression that the rule regarding posting the same story twice, or even potentially plagiarism will interfere with him posting his character's perspective.
I'm trying to do some research to see how this can be done, and I expect that with any luck and the hope that this is just an unfounded fear, all of you will be quite able to enjoy his work as well! After all, no pony can spot everything, and some say no pony sees things the same way!
So, here's to the hope that we'll be able to show our stuff together!

Edit: after some naming difficulties, he isn't able to use Silver Wing like we hoped, it was already in use and we didn't think to check.