If all your work is "grand vistas", its at optical infinity, so you need to be a ble to extend your bellows to the focal length of the lens (210mm) to achieve fo cus. However, you probably want a couple of inches leeway to allow for camera m ovements. If your wide angle bellows can extend to 10" or a little more, you ca n probably handle this type of work; if not, you may have some difficulties.

If your work is not limited to distant scenics--for example, if, like me, you sh oot the type of things that Eliot Porter used to call "intimate landscapes"--you probably want a bellows that can handle greater extension.

Since you've already got the wide angle bellows, why not stick with it a while a nd see if it handles what you need. You'll know soon enough if its limiting you r work.