It's an entry in a contest to win an "Objet 3D Printer with a 6 month supply of 3D printing materials. Ten first prize winners will receive an Up! 3D Printer":
http://www.instructables.com/contest/makeitreal/
Given that the grand prize is an object printer "worth $50,000" and 6 months of printing supplies, I can't help but wonder if printing supplies might then turn out to be very, very expensive. In looking at the other entries, a bass does seem like a bit more practical end result than the Ethiopian Warrior Skullboy, etc., but it's not supposed to be a "how to build a bass" article. Now, if you wanted an Ethiopian Warrior Skullboy, there you're pickin' in the high cotton.... :laughing3:
http://www.instructables.com/id/Ethiopian-warrior-Skullboy/
Wish I'd seen these articles on cordless drill battery hacks before I destroyed the damn thing and reverted back to a totally corded, 120v drilling life -
http://www.instructables.com/id/How-to-make-a-3d-Printed-Cordless-Drill-Battery-Ad/
http://www.instructables.com/id/Simple-12V-Cordless-Drill-Hack/
etc.