With the Nikon body on the back, this is going to be a fancy macro bellows with movements, and won't really convert your 35mm camera to a particularly functional view camera, because you'll only get infinity focus with lenses starting around 75-90mm, I'm guessing.
With an RB back and LF lenses, though, it could be a pretty neat addition to an RB system. That said, you can find a Galvin 6x9 monorail, which I think can take RB backs for around $350. This looks like it has more precision movements than a Galvin, though.
The porthole-style groundglass looks interesting but would be a real pain to have to replace.