We want to carve pearl shell. (We live near a pearl oyster farm.) The shell is somewhat uneven. We have a small laser engraving business but the laser barely marks the shell. Does anyone have any suggestions for a small CNC machine that we could use for this purpose? (FWIW, we know CorelDraw quite well but have used real CAD software only a very little bit.) Shipping weight to Fiji also is a concern. (We pay duty and VAT on the shipping costs as well as the cost of the machine.)