Flash49: Not quite sure how this works exactly as I haven't tried it yet either, but suspect you will still have no ink level monitor - the 4200 will just recognise the cartridge and will allow printing as normal. Let's know what you find. I'm about to flog my 4200 as I captured a demonstrator iP4000 on eBay a couple of weeks ago, and am quite happy with it. I can refill to my hearts content. Think Canon called it wrongly this time, especially with the incredible prices of their ink here in UK. I can actually buy a brand new iP4200 complete with a full set of ink carts (£50 worth) with 12 months warranty for about £60! How stupid is that? I'd much rather pay £250 or so for the printer and have the carts available at about £1.50/cart, and they would still make money. I bought a full set of 5 carts for the 4000 last week from the Channel Islands for about £5 (incl S&H) . No contest.