I wonder if there's a way to open up the semi empty tank and fill it with the ink from the full tank. Anyone know if this can be done?
If the 8300/8400 tanks have a lower end like the 5000 series with the two ports having interior rubber diaphragms, these may be pierced with hypodermic needles ~ 23 gauge 1.5" - one for each cart. Using a large capacity syringe if you find one - 10ml or more but 50ml for your huge carts if you can find one!) insert the needle through the diaphragm (don't think it matters which one) keeping it vertically true as poss. on insertion, aspirate a syringe-full from the donor cart with syringe down, then turn syringe up, detach the syringe from needle to equalize pressure, and inject through a needle placed in the recipient port, then detach syringe and repeat as needed. Be sure to do the multiple cart inversions to mix well first. I've scavenged 5-10ml ink in desperation from "empty" carts in the past by forcing the needle through an upper corner of the cart, then injecting through the recipient cart port as above. No leaks noted.
A pharmacy will have at least smaller syringes (2.5-5ml), and certainly the needles, without Rx; a med/surg. supply store the larger hypodermic syringes.
