If you use a 68/3000 preset, I would suggest an in-line reg to gring the pressure down to about 500 going into the marker.
You should get about 800 to 1000 shots from this setup.
If you want LP, install a Gladiator or Stabalizer or Vigilante in the ASA, do the LP mod and you will get 800 or more shots from the same tank.
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