RE: Tail-heavy Top-Flite Spitfire
One of the problems with the Top Flite Spitfire is that the tail plane is 35% oversize compared to scale. Specifically the horizontal stabs, but the vertical is also over sized. Not sure why Top Flite chose to enlarge the tail surfaces so much, but they did so what you end up with is a kit that is very easy to build excess weight in the tail.