WOW
This Thread makes me so happy!
Infact I was planing to start a thread like this focused on making a printer with Lego... an idea i toyed with quite some time ago

I will be back here to help.
If Peachy Printer INC goes dormant for a while Id love to send some of the parts out to a person that can distribute them amongst the community as needed.
That might be the best thing while Im trying to piece my life back together here lol.
Another thought is getting the arduino uno to replace the circuit, Im sure this is possible, and would be much easer than populating your own smd peachy board.