Reply by Aj2

Ok I know exactly what that is. I had one about ten years ago with a helical Head it had six rows of nine total 54 inserts.
What you want to do is to just snug up the gib screw with the jam nut. It should be tight but not so tight you cannot move the table up or down.
That should bring the tables back into alignment just like they were set up at the factory.If it doesn’t you might have gotten some crud in the ways it doesn’t take much to goof up the fit.
If that goes well raise up the outfeed so it just barely touches the bottom of a ruler on the heads highest side.
Then shim up the lowest side of the heads bearing block.
The jointer I had there was a nut that I could loosen and slip shims under.
Here’s a pic that shows gib screws with jam nut adjust both carefully.
Good Luck

-- Aj