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Hello, Is there a way to upgrade a LED 500 to a LED 700 ?

The 'rolling a tank to make sure the nitrox is mixed' story got me thinking (not necessarily a good thing as you'll see). Assuming a set of doubles (AL80 for example), isolator closed. Right cylinder got filled with 3000psi O2, left cylinder with 3000psi air. Now the isolator is open. How...

I'm looking for maintenance free diving shears - titanium would be ideal, but can't seem to find any. Is it too soft for shears? Is there anything better than stainless 300?

Hello, I'm the average 'experienced' recreational diver, and I'm looking to hone my underwater skills. I hold an old FFESSM/CMAS 3 certification, as well as a PADI rescue (I wanted a refresher). I'm diving a somewhat hogarthian rig (oxymoron?) already, so after some research, the GUE...