Thanks for posting that link Aoluain. Having just acquired a Polaroid 2000, it's rekindled both my interest and a bit of my faith in the TiP films.
Chalky also put me onto the Px 600 silver shade uv+ film (I like the black border version for some reason) so I must get my mitts on some soon and see if I can fashion an ND filter somehow. Mind you, a few shots I've seen seem to be without the ND and with just the dial set to "dark". Any thoughts on this?
Cheers again. Paul.