Back on the subject of risk. I had a customer bring in a sterling silver child's cup that had names engraved on it dating back to 1846 (or maybe it was 1864, whatever it was, it was long ago). The only area remaining on the cup to engrave was an ornamental "ridge" that was about 3/32" wide and went all the way around the cup. Another option was to start adding names to the bottom of the cup. For me to engrave on the "ridge" it would have cost them $40 (more risk for error). Engraving a name on the bottom would have cost $15. They now have a name on the bottom of the cup.
