Good Morning Two Ponies,
Glad to hear you found the post, and You are on the BEST site for engraving info the web. Mr. Lindsay sells the Best line of Air Graving tools around. I'm sure you will be very happy with these tools. If you need anymore help, or have any more questions Please feel Free to call me. I am sure Steve can answer yout questions much better than I can, and He is a real nice person to chat with.
Enjoy Life to it Fullest,
JT