Homebrew PCBs

I have C68 also. I have decided to switch CX4200
again, main reason is, I will design a paper emulator
in order to be sure the exact position of the PCB on
printer, with this emulator I could be able to place
pcb to a known place and start printing. I think it
will greatly solve alignment issue during paper
feeding phase. The advantage of CX4200 is, it has
optical encoder for both X and Y axises and it has
optical paper sensor where C68 has only optical
encoder for X axis, Y axis is step motor controlled
and has no idea about what is going on Y axis (no
feedback). 
May be Epson has some special ESC/P2 codes to cancel
paper feeding and paper sensing but I don't know it.
Volkan