Another 3d Printing Challenge $2,500 + A free 3D printer if your design is

[Nils_Hitze]

Another 3d Printing Challenge

$2,500 + A free 3D printer if your design is produced + GrabCAD shirt and mug
http://3dprintingindustry.com/2013/01/25/layered-labs-design-a-3d-printer-challenge/

[Matthias_Lewen-Riege (Matthias Lewen-Rieger)]

Sounds nice and all, but I’d rather have a percentage of the sales than an one-off payment