Batarang from "Arkham Asylum" Game

Step 3 Shaping the Wings

The next step, after smoothing off the rough edges with a file to make them prettier and easier to handle, is to make the three pieces true to each other. The easiest way to do this is to make the backing piece as perfect and symmetrical as possible, decide which way up it will face, and base the other two wings off that. Mark the center of the back piece with a dot.

First off, try and align the pivoting wing with the backpiece, and correct the pivoting wing where it needs it, using a file. Once the places where they overlap matched up, mark the pivoting wing with a dot that overlaps the back piece dot. Hold the pivoting wing in place with a small clamp or clothespin and shape the fixed wing until all three pieces fit together neatly.