Remix - Battery Adapter - convert three AA to one D cell

Reference the original: http://www.thingiverse.com/thing:33706
Like Maikalguy's adapter, but I notice the 4xAA package is bigger than a single D cell, and wouldn't fit inside my Mag Flashlight! So this 3xAA adapter is slim enough to fit. I have some additional mods to this coming, too.