Step 22: Finished Soul Cycle Mothership -- Now get out there in your community, lead inspiring social rides, amaze small children, demonstrate Human Power.
The bike rolls like a normal bike but with amazing music quality: Check the video! http://www.flickr.com/photos/rockthebike/2419267145/http://www.flickr.com/photos/rockthebike/2419267145/As you can see from the pictures, at the time of this writing ...
After creating 5 or so fully custom Soul Cycles, painstakingly, one at a time, I needed a way to create attractive cabinets in a fraction of the time. So I invested extra time in the process of making a mold to be able to reproduce an attractive curved form in fiberglass. Now Rock the Bike can bust out a Soul Cycle Mothership in about a week, not months like the previous custom bikes.
Step 1: Sketch shape you wish to mold, keeping in mind undercuts in molding process
An example of an easy shape to mold would be a beach ball. An example of a hard shape to mold to would be a stegosaurus. What makes the stegosaurus harder? It has features like legs, that will make a left / right mold unable to pull apart. The spikes on a stegasaurus' back would create steep draft angles that would make a top/bottom mold difficult but possible to release cleanly.
For my bicycle music system, I chose a shape that was relatively easy to mold with a left / right mold.