Minidisc External AA Battery Adapter

This is my first 3D model done in SolidWorks! I wanted to learn how to CAD model since getting a 3D printer so this is a learning experience and practical since there is nothing minidisc related on Thingiverse. It's an adapter for my Sony MZ-R90 and MZ-R900 minidisc players so I can build an external AA battery box (the internal Ni-MH batteries are getting old and have less capacity compared to a AA). Commercially available adapters can be purchased online but cost way too much for what boils do