Alan is right you can't do three legged A finals on rc-timing, it is not possible on the 2006 version anyways, might be on the new version but I doubt it. Only way round it would be to have two copies of rc-timing open and filter out the a finalists from the main meeting me thinks, hassle lol.
Would it not be the case that the A finalists would struggle to get charged in time to? It's ok when you have a big attendance but if it's a bit drizzly and people (like danny won't turn up because it is a bit damp) don't turn up attendance is lower resulting in less time between finals. I would love to do three leg Finals though