I have 2 set ups for doing heads.. one is a
electric die grinder with a variable speed
controller and a air powered one.. I like to
keep both set ups light(hours at a time does
get tiring on the hands).. I have about 25
burs for different jobs.. alum heads I use
the course burs and tootsie rolls.. iron I
use the finer burs.. I spray WD40 on the iron
burs and bees wax on the alum burs.. I like
the 1 1/2" long burs for most of my work.. I
have 1.5", 3", 6" and 1 12" long burs the short
ones are easier to control.. dont let the burs
get hot(thats usually a dull bur or its loaded
up)