Great idea. I'll have to suggest it as an alternative for one-off test fixtures.

(We have a prototype shop with an "industrial" 3D printer, ShopBot, drill press, jigsaw, arbor saw and radial-arm saw. The 3D printer is mostly used for "showy" prototype housings. The ShopBot mostly for milling delryn blocks for bed-of-nails fixtures. The saws and drill press are used for most other test fixtures (because is usually a lot faster than preparing the design files required by the ShopBot or 3D printer, and the 3D printer is painfully slow).