Both of the ARFs from Tower are listed as 71.5. When the plane is in the bones try putting it together and mount the engine and find out how it is going to CG. I do that anyway, I don't hard mount my gear until the plane is almost finished, I just tape servos and stuff around the plane and see where it all wants to go then I hard mount. John may or may not be right, I learned never to argue with him a long time ago but I'm thinking he could be wrong this time. Maybe???? Can't wait to find out though.