If the idea of adding yet one more item to your workbench – at the cost of several grand and countless precious hours – is just too much to bear, there are still plenty of ways to experiment with 3D printing. A number of home-brew 3D printing stores are starting to pop up that let you drop off files for printing (or that will work with you to develop your own ideas). And MakerBot now has kiosks available in more than 30 Microsoft stores (where you can also get your head scanned for $5 to make a bust). There are also online services like Sculpteo and Shapeways that let you upload files you've created (or downloaded elsewhere) and then have them printed in a range of materials including precious metals.