I'm not sure if I am the one to whom you are refering, but I sign everything I make with a dental-like tool.....an engraving tool that does about 400,000 rpms......with a good sharp bit you can write your name or anything else for that matter, as easily as you were writing with a pen.....There are many of these on the market...mine is manufacture by SCM and was @$400.....A Turbo-carver is similar.......The way I see it, if you get a brand made, it might cost $50 or more dollars(its been a while since I priced one).....If you bought a Turbo-Carver for $160 or so, you'd have a tool that is capable of many carving tasks. I use my SCM tool much more than a Dremel.....The SCM is capable of very detailed work.
Here are links to a body that I used the SCM to open up some inclusions in the burl of a body so I could inlay some crushed turquoise.....also a link to my engraving tool.
http://www.fenderforum.com/userphotos/index.html?recid=4696
http://www.scmsysteminc.com/engraving.php