Another wing jig question - adjustable?

I've noticed some folks using a threaded rod for the brace on the wing jig (RV-7). Okay, so you can really fine tune the horizontal level that way, but I'm interested in the general consensus from folks: wish you had that feature, or had it and it was overkill, or ????

Thanks!

Edit to add: The 4x4's are up, and I'm starting to put on the arms and cross braces.

Adjustments

I'd say very important. I had three adjustments on each wing. One either end to eliminate twist and a screw jack under the center to remove sag.
Yea, I suppose a prepunched wing could be built on a bench and probably be fine but I had the ability so why not.

Build them back to back with about 36 inches between them. Saves hundreds or hours

Update - Had the pieces to make the cross brace fixed (as per Vans), so that's what I did rather than delay further. The jig and cradle took way too much time for what was supposed to be an easy task.

(no space for both wings at same time, unfortunately)