I'll add a second recommendation for Jeff Nicol's steady rest. They are much cheaper than any of the other one's I've seen and are built extremely well. I won't core a large piece or make a large hf without it. I also have two pairs of the oneway steady rests. For what I need them for, you really need one on each side. They therefore cost more and are not nearly as good as Nicol's rests.
Regards, Hilel.
No one has the right to demand aid, but everyone has a moral obligation to provide it-William Godwin