Instructables user avik writes:

I got my first Vespa about a year ago and have loved tooling around New York on it. From day one though I wanted to be able to listen to my iPod as I zip around but the idea of riding with headphones on in all that trafiic seems crazy. When I read on a Vespa forum that there is a secret compartment behind the two knee pads that are above the glove box I saw the opportunity to do a really cool mod to my scooter.

This instructable covers circuit design, custom 3D modeling, and modding existing components, all in order to tote some tunes on your ride.