I have an HP OfficeJet one which I guess is kinda "prosumer" (cant remember the number - 8600 or something). The ADF works, but is single-sided so that is why

I have an HP OfficeJet one which I guess is kinda "prosumer" (cant remember the number - 8600 or something). The ADF works, but is single-sided so that is why I am urging others to learn from my mistake :-) I know that the cheapish Canon Maxify printers do duplex ADF (the Canon Maxify MB5150 is what I plan to buy next time my current HP one runs out of ink since the ink costs almost as much as the printer!), but I cant recommend it since I've not used it yet. HTH.