Dave check out the engravers cafe web site and also firearms
engravers guild. Both have forums where professional and amateur
engravers can answer your questions. Personally I have always found
that if you buy the very best tool you will not regret it in the
future. I use an old gravermeister and wish I could afford to
upgrade to the newer more advanced systems of palm control units. Go
with GRS or Lindsay, would be my choice.