Everyone selling auto-reset chips for Epson 802 (the US version of WF-47xx ink carts) has stopped selling them. I suspect a recent firmware has defeated the 4-time use ARC's; they were probably easy to defeat because Epson just blacklist those ID's in an update. I still see people selling remanufactured cartridges with one-time chips, however they are quite pricey.
I will second this. I would like borderless printing w/ the 4s printhead (for speed) and the WF-4740 seems to fit the bill precisely. I was nearly going to do the auto-reset chip, but it appears these were killed on a recent firmware verision. Keep me posted if this comes out. -Cheers