After the jig was straightened, I tried to put the old skins on, to see if how far off they were. For some odd reason they fitted. Some rivets are a bit tight on the aft spar near the tip, but not by much. I guess the flexibility and the diameter of the holes compared to the rivets allows for large variations for pieces of the size of the HS, hence the importance of jigs (straight jigs that is).
Contacted Vans about this, and according to Ken Scott: "I would try riveting the stab back together, with it held in the jig. Variations this small can be taken out just by re-riveting". So the fix is hopefully much easier than first anticipated.
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