I had this very thing happen to me. A friend purchased some beautiful 10' lengths of quilted maple for a dining room table and had them sawn in half to transport. Our initial plan was to make 2 tables that could be placed together at the joint, but then I thought - why not try to join them back together? Worst case I'd have to cut them back apart and try something else. I cleaned up the joint with a router and used a spline to make the joint. The result was surprisingly good. You can see the joint if you are looking for it, but it certainly does not draw attention to itself.
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