Were A and A1 (on page 10) equal?
If they were equal, they Stab should have lined up easily.

When I started on the Stab, I mis-read the bottom of page 13.
It says to put the T-pin in the TE of the stab. I mis-understood somehow and pinned down the LE.
Could not get the stab to line up at all!
Putting the T-pin in the center of the stabs TE, should keep the
control surfaces cented up on the tail.
If the main wing is centered, then you should only have to tweak the stab (LE) a small amount. It should 'Pivot' (last item on page 13.

If you have the rudder fin installed, that would make it a lot harder to remove the stab. Removing it might tear up the wood a lot.

I've seen stabs that were offset from the wing about 3/4" and the plane flew just fine. However, if the offset is going to mess up the location of the control horns & push rods so they can't be hooked up per the manual, I would think about removal.

Maybe a very thin razor saw could be used to cut a line above and below the stab. You would be cutting wood, not epoxy.
Once it was out, you could carefully remove the glued balsa from the stab and add some spacer wood when you re-installed it.