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Hi all, Having just finished my second color cart on my new Epson 1200, and being somewhat thrifty by nature, I decided to see if I could somehow build a big ink system, since the folks in Europe don't seem to want to sell theirs (I e-mailed them several times), and the MIS folks can't get their Cobra into production. I am an engineer (mechanical and electrical) and might be able to devise something. Anyway, I pried the top off the color and black cart, and discovered the infamous sponge and microfilter at the bottom. Since I'm sure this has been covered before in some FAQ (I don't know where, however), these questions might seem redundant. Is the main problem with refilling getting the ink to the bottom of the sponge so that it can come out the microfilter at the bottom? I assume that once you get the ink to the bottom, as the printer prints, the ink draws out by capillary action. True? Why is the sponge there in the first place? To keep an even flow to the microfilter? If the above question is true, why can't the whole sponge be replaced with a piece of sponge 1/2" high at the bottom of the cart just covering the microfilter? You could probably use a small amount of superglue to hold it in place. The rest of the chamber could be filled with ink, and if you don't let the sponge run dry, you could keep putting ink in the chamber with a syringe through one of the holes under the blue tape covering. I suppose the big ink systems do somewhat the same thing. True? I don't understand how the big ink systems get their tubes from the cart to the ink reservoirs. When you put the cart in the 1200, you close a purple plastic cover over the cart and snap it in place. There is no room for tubes coming out of the cart, either on the top or side. Does anyone know how the feed tubes exit the cart? Does the plastic cover have to be modified, and if so, I suspect that would void the warranty. True? How does the printer know the ink cart is empty? Is the quantity of ink somehow measured at the printhead? Wouldn't this affect the big ink system? Thanks in advance for any advice. ------------------------------------------- Regards, Steve Jacobson firstname.lastname@example.org <mailto:email@example.com> - Please do not include an entire message in your response. Delete the excess. http://www.leben.com/lists for list instructions.