Re: Airgraver and airsupply.
The co2 works best with the palm control. It will work with the foot pedal model but you will be going through a lot of gas since it takes a lot more air to make the footpedal model work.
A full 20oz tank will last about 8hrs with the palm control. I would guess you would get maybe an hour of work done with the foot pedal since it uses more air.
If the extra cost is an issue you can get a small air compressor fairly cheap. It doesn't take large compressor to run either tool.
Ray
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