Do you can read italian? I have some problems with my english. Whi do not try with milkshape? It has the possibility to mirror a solid. I hope it can help you the only limitation is that milkshape don't manage so many vertices, you have only to try. carlo.chillemi@tiscalinet.it, let know me please. You can find milkshape3d here http://www.swissquake.ch/chumbalum-soft/