Homebrew PCBs

>Also, make SURE that the chips are specified for the R220. While the
>R220 and R340 both take the /exact/ same ink tanks as the R200 and
>R300/R320, Epson has apparently changed the circuitry enough that it
>will reject the original auto-reset aftermarket chips for the R200. It
>doesn't seem like it was hard for them to create a workaround, but if
>you wind up with R200 chips, they will not work.

You could replace the auto-reset chips with the correct ones. Its actually 
pretty easy to do.

Smokin Paul