The technology lets users send a file of a 3-D design to a printer-like device that will carve the design out of a block of resin. A manufacturer can make scale models of new product designs without the expense of model makers. Or consumers can have models of the avatars they use online. Ultimately, manufacturers can consider making some components on demand without having an inventory of replacement parts. Printers priced less than $10,000 have been announced for 2008, opening up the personal and hobbyist markets.