If you're cheap (or thrifty) like I am, you could try making your own. I think one of the magazines a while back had plans for one, based around a piece of 3/8"-16 NC piece of all thread. The 16 threads per inch give you 1/16 advance per turn, or 1/64" per quarter turn.
Plus, it's always fun to make something that costs "real" money, and spend your savings on something else.
__________________
Doug
1 John 1:9
|