I've just just started experimenting with dry type tintype but the Rockland stuff is not available here in UK. I had some sheets of aluminium, which I think are for lithographic printing about the same thickness of film so can fit into dark slides or a grafmatic. It's because of this I started this project. First results were good but I have to experiment with own developer. If the plate in your kit fits into a septum or holder then go for it.
you will need to modify your septums a little bit to accommodate the thickness of the plate.
i have put the rockland plates in film holders but without modifying it is not eazy, i admit
i haven't stuck them in my grafmatics, but i am assuming since they are the same thickness is flm
holders you will have the same troubles.
good luck + have fun !
john