I really love the approach take by the Peachy Printer [1] guys. I wonder why more people aren't exploring that route (dripping system, or any water-assisted system)? It shares many of the strengths of this one but got far less attention.

I wonder how it would perform with a controllable dipping system and a DLP.

[1] http://www.peachyprinter.com/#!methods/cjg9