The goal was to be 1:1 with the original model in the game. There is a seven-year-old level editor out there that its developer never completed. While it could not output an OBJ as promised, it did allow me to get high-resolution orthographics and a vertex list. Those combined with the ability to tumble around the original model while I worked allowed me to get this as authentic as humanly possible.
There are some changes, however. The SuperFX model format allows for things that count as invalid geometry today. Where the original model had T-gons, I added vertices to allow those faces while remaining faithful to the source. Over all, this model has 8 more verts and 11 more faces than the original model. They do not contribute to the silhouette, however.
Regarding size, the original vertex list stepped conveniently into meters. A Google search for documents on the Arwing's design confirms the sizing, so the end result is a model perfectly to real-world scale.
This model is ready for UV mapping or sculpting. Please feel free to do so.