From SLS-3 scanner I got two faces of a butterfly, I need later to enlarge, cut, 3d print and paint it.

Problem is being almost 2D I can't find enough overlapping points to perform automathic alignment and merge.

The marker I used for initial alignment (the thong holding the pin that fix the butterfly) was only on one side of the object so I can't use it for both.

So interested to know if there is any smart way to align the two side and next merge them in one single mesh, using DAVID 4 or other programs (Meshmixer, 3d-coat or similar).