Originally Posted by User1

Well yeah I was thinking I could use a 3 ring crank but I planned to not have it where I could shift. It would be set up on one of the rings before a race. This would keep with their requirements but allow me a little flexibility. But as it was already pointed out, not a good idea to incorporate a derailleur with a coaster brake setup. Further more I don't have any play using the rear dropouts. They are pretty much set-it and forget-it. No sliding it back or anything.