>>2908834OP here.
So the Tachihara was quite flimsy in my opinion. It doesn't handle larger lenses well either.
I found it to be an OK camera, with short lenses. But it doesn't have axis tilt. Which means you'll spend a long time finding the right focus plane.
You can get a Horseman 4x5 quite cheaply. There's one on Ebay at $680