I'd like to see the Peachy "done right". The business with using the sound card and the assumption of a steady drip rate and the lack of a means to turn off the laser could all be fixed if the project included a $25 microcontroller (a recent indiegogo project showed that a $9 Arduino board is possible). I'd also like to see all of the parts of the machine (pipe and reservoir and anything else other than raw materials) included in the price.

I predict other problems with the Peachy's approach - if your PC gets an email or the screen saver kicks in - the print will suffer. Any kind of timing glitch whatever can do that. Having a USB interfaced microcontroller would fix all of that.

I guess I didn't need a $100 3D printer - a $150 3D printer that would work MUCH better would have been just as amazing.