Homebrew PCBs

>
>Isn't that a plotter that slides the paper past a one-axis pen?
>If so, you're gonna have a terrible time keeping registration.
>I use a flatbed with stationary media and it works fine.
>Only problem is finding a pen fine enough to do tracks on
>20 mil centers.

I'm getting set up similarly, with an A size flatbed plotter, and a laser 
printer for toner-transfer.