Personally, I wouldn't go near a project like that. I would have left the violin with my luthier.
And I did . . . twice. The first time, the bottom separated from the ribs just to the right of the button. Second time, the top separated from the ribs just to the left of the button. Both times, I took the violin back to my luthier for repair.
It was interesting. The glue must have been weak in those two seams, thereby negatively affecting the violin's voice. Because after the second repair, its voice sounded so much better than ever before. Had it not been done correctly, I doubt that I would have seen that improvement.
Even for something as trivial as replacing a tail-piece, or fitting a chin rest to the violin, I take it to my luthier. Both of these occurred, and my efforts to effect solutions failed miserably. With my tail piece, he used a Kevlar tail gut to which I wouldn't have had access. And when he fitted my chin rest, he did a bit of carving on the underside to avoid its touching the new tail piece. He also positioned it so as not to affect the perflings underneath.
Long story short, I really enjoy my violin. I think it has quite a beautiful voice, and I want to keep it like that.
I have had a small supply of hide-glue crystals since 1954 and a good, very thin artists' palette knife. I have fashioned clamps from wooden thread spools, long bolts and wingnuts for violins and I bought a few larger clamps from hardware stores for cellos.
It is easy to wipe the glue off external surfaces after clamping and a little water seems to not hurt anything if needed to further clean the surface.
All told I have had the open-seam problem no more than a half-dozen times and all repairs worked quickly and have held to this day. On one occasion I also used the glue and clamps to re-glue a cello fingerboard that had come loose when the cello fell over.
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