Thank you both!
I'm enjoying the heck out of the Polaroid SX-70. The aesthetic of its rendering, and of the Impossible Project films, is very different from most other cameras. I want to do a whole set of projects with it.
I've also managed to acquire a Polaroid 350 pack camera. Soon as I adapt a modern battery to it, I'll see what it does with some Fuji 3000 pack film.
G