jackson
Printer Guru
This link describes a 'valve type' spongeless cart.Still not sure how the length of the neck of the problem cart conributes to the problem inasmuch as the other carts in the printer seem to work.Perhaps something to do with the air vent setup?
http://www.inksupply.com/spongless_carts.cfm
http://www.inksupply.com/spongless_carts.cfm