For lettering to work well, establish a baseline, by dragging
dividers, one leg on and one leg off, the metal in question.
Good lighting and a high polish, both on the receiving metal, and
the marker-in-the-recesses blackened stamp, will give you a good
reflection to judge where the individual stamp gets applied. It also
helps you to judge letter and word spacing.
For stamp bounce, a little shock-absorptive material below the
receiving metal will help. Poster- or bristol- board might help as
might multiple sheets of paper. Whatever works, just get the
variable defined with some equivalent gauge copper scraps.
Good luck to you, H Peters!
Dan Woodard -- IJS