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  1. Recreational Tri Mix Thoughts?
  2. recreational heliox
  3. tech head dive computor ?
  4. GAP Software
  5. Trimix and Gas Blending
  6. High O2 Mixes
  7. something to ponder...
  8. Question about Mark 2 argon reg.
  9. Deco Software
  10. New phone & dive software