Author has written 7 stories for World Only God Knows/神のみぞ知るセカイ, StarTrek: Voyager, How to Train Your Dragon, Chronicles of Thomas Covenant the Unbeliever, Belgariad/Mallorean series, and Star Wars.
Rule 1: Do what's right for the story.
Rule 2: Don't talk down to the reader.
Rule 3: If it doesn't hurt, it's not writing.
Those rules cover most of the story. For the rest of it, remember this:
"For a true writer each book should be a new beginning where he tries again for something that is beyond attainment. He should always try for something that has never been done or that others have tried and failed. Then sometimes, with great luck, he will succeed." — Ernest Hemingway
Images of the Onoka lightsabers will be available on my Deviantart page.