Re: want to buy palm control
For silver and such you shouldn't need the new NitroG20 - it's made for people who need to do heavy duty work. It's also fine for delicate work so you could use it if you think you'll need the extra power in the future.
I'd start with the regular (santoprene) handle - you can always get another handle later.
The AirGravers are inherently quick change - the graver just slips into the handle. There's an O-ring to help hold it in place so it won't fall out when you're not using it. When you are using it the pressure against the metal means it can't slip out. There are also some set screws you can use to secure it more tightly. I replaced one of mine with a small knob that comes with the AirGraver so it's easy to tighten down on the graver. I don't have to, but it holds it a tiny bit steadier. There's a maximum size graver you can use the normal way but Steve has some adapters that I think let you use larger gravers.
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