Cooter -
Since the "Light Vader's Saber" event is Robin's baby, it would be best to ask her permission to do something like that. While, I think, it is a pretty awesome idea. This IS her event and it is not good to step all over the toes of the individual putting on the event - in this case, her. Feel free to discuss it with her.
Everybody, let's remember that if you have ideas for events, current ones in the planning or something in the future, get together with those who actually do the planning of those events. There are annual trooping events where the same organizers work hard, year after year, to put it together.
I'm not saying you can't offer assistance, I am sure assistance is always appreciated. But check in with those event organizers to see if that is something that they want for their event before proceeding to follow through with whatever idea you have come up with. It saves a lot of headache and hassle in the long run.
Thank you.
- Bill