One point that Billy made I think needs to be put in your talk in some way, And that is the point that the WT blamed the r&f for believing the WT on 1975. If you could somehow slip that in even in passing it would probably make a lot of folks take notice. If you are asked afterwords about it you only need to refer them to the publications leading to 1975 and then the articles stating that it was the r&f fault.
Good luck, and please let us know how it goes.