Peter, while it is true that the rbs can deliver 8x8, and most of the lenses easily cover that, the body will not deliver 8x8 without modification. I have modified my rb67 pro sd to provide almost 8x8 cm images on 4x5 film (type 55 and quickloads). This involves removing part of the mirror damper / catches in the chamber of the camera... otherwise you wind up with a frame the shape of a rhombus, with the top of your image having a shadow that narrows to about 72mm. Anyway, after my modifications, the camera works as good as ever. I think I get something like 78x78mm. If anybody wants more, they may as well just put the rb lens on a view camera like Erie does.
Brofkand, confirmed! The fuji emulsion transfers are *far* more robust than the polaroid ones. You can stretch and poke and whatever. Really good fun.
There are two things you need to know, though: (1) they will not adhere by themselves to your new paper like polaroid did: you'll need to attach them with glue (personally, I see no point in rolling them flat with glue, I like the 3D look and simply let the transfers float over the paper, adhered only at the edges); and (2) unfortunately the b&w emulsions do not seem to come off; I have boiled fp100b for ages and can't get it off.
Oh, and beware that (3) image transfer is an entirely different thing with the fuji materials.