I wanted to share a method that has allowed me to use almost ALL the ink in my 440 cc carts. Out of weekend desperation I needed to finish a job and was out of....you guessed it...Magenta. I had been saving all the empty carts. to recycle so I decided to ignore the printer warning and continue to print until the cart ran dry. When it was empty I decided to weight and it weighted 288gm. Based on that I started weighing my so called empties to find that some weighted as much as 312gm based on that I started loading the carts one at a time and printed until they reached about 292-294 gm because I did not want to run dry again I just did that the first time to get a Baseline. I was lucky that the job was 3' x 3' banners so I could check the weight in between banners. I have been doing it with all my so called empties. I do it on smaller jobs so that a mess up is not that costly. I also break off the warning tab so that I do not have to listen to BEEP BEEP.