Scott, the G&L 50% SD is basically a double size A&A (formerly Bud Nosen) 1/4 scale Citabria - the structure is identical. It's not a scale model, it's an enlargement of an existing stand-way-off-in-the-next-county model. The subject of this thread is much more scale, altough there are a few bugs to be ironed out yet, I am in touch with both Michel (the producer) and Ken (the builder) about this and we will be discussing these details around here. Marcus