As I posted on the comments on Youtube, the Peachy printer just achieved a 4 micron layer height. Even the Form1 at $3300 only prints as low as 25 micron for layer height. And this 4 micron layer height would be a lot lower if the container was larger. A larger container means more drips per rise in Z axis. A 10 gallon fish tank could yield less than 100 nm layer heights, for example.