Homebrew PCBs

Hi All,
I spent couple of months(~4 months) to design my own flat bed inkjet
printer and finally I could get some printouts. It is based on Epson
inkjet head and X-axis mechanics. I designed required drive
electronics, head drive signals, servo control, frame buffer and micro
controller to communicate and manage the circuit. On PC side I
developed RIP (raster Image Processor) that is used to convert bmp
image to the printers frame buffer format and interface program to
control the printer. In this design all time critical jobs are done by
fpga. Microcontroller supports minimum basic commands such as x/y
positioning, servo control, frame buffer download, piezo drive
waveform download and activate inkjet firing, it is also responsible
to do USB interface. The remaining control is done by the control
program running on PC side.  
I did only a few experiments and saw that 4/4 (trace width / space) is
possible to do if I can do uniform etching ( under etching is also an
issue).
I'll try to upload printed image and original bmp image used during
printing. As you'll see original image is perfect. Later I'll do some
performance tests and try to post the results. This  printer can do
720x720 dpi and images that I'll upload are printed at that resolution. 
Uploaded images will be under 
http://tech.groups.yahoo.com/group/Homebrew_PCBs/files/Epson_inkjet_Volkan/

Note: I don't know whether the details of the design is an off topic
or not for this group. I need feedback from Steve.

Cheers,
Volkan