Hi Daniel ,
I have set stones with a GRS system for almost 20 years.. not long ago I purchased a Lindsay Palm Control Air Graver ( clasic handpiece ) What a difference !! .. I saved about 50% of time doing settings . I'm able to remove smoothly large chuncks of metal by one pass instead of 5 or 6 passes in one place . Not to mention, less noise and unnesesary vibrations which are not the best thing for your body and ears . The Linsay tool and GRS is uncomparable . The first one is superior the second one become clumsy to me. See post from other day
http://www.engravingforum.com/showthread.php?t=1334
all the best !
Stan Jarmolowicz