When I ordered my juice from Janty they were nice and threw in a free 5 pack of carts for the Janty Classic. That's great... but I don't have a Janty device ordered a DSe901. My cig is not here yet so I can't tell if it will fit or not. Anyone know if the carts are interchangeable? If not maybe I can pull out the inner part with the juice and stuff it in one of the 901 carts