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What unit? Doesn't strike me as the worst thing, but you'll need some extra practice and training when the different unit arrives. That's alright because you should be doing LOTS of easy practice dives after your course anyway. You'll want to drill any procedures that are different, maybe do...

Don't overfill aluminum tanks! Well, maybe by like 10%, but you cannot safely "cave fill" aluminum like you can steels.

No noticeable difference in buoyancy. It's a little bit colder and costs a few extra bucks. I do it on mild trimix dives when I don't want to carry a separate suit inflation bottle.

- Go to dive shops and try them on. - You can wear neoprene or other socks with your boots, might help - I like to use the thickest sturdiest neoprene boot I can get, I've had cold feet in cold water but never overheating feet in warm water. - You might look into sailing dinghy boots, similar...

I hate to be that guy on the internet attacking the premise without answering the question, but what's the issue with storing one packed scrubber for use over a couple of short dives? Why would it be so "impractical" to leave it sealed in the unit or a labeled drybag?

Sometimes I pull my mask up on my forehead. It's a perfectly reasonable place to put it, sometimes. I don't put it up there when it could get easily knocked off and lost, eg. surf entry/exit or floating in deep water. More often I pull it down around my neck, where it is much more secure, but...

Small companies generally make the best technical diving equipment. More innovative features, higher build quality, fewer corners cut to pinch a penny. Big companies are just as (if not more!) likely to end support for an unprofitable product as small companies are to die.

Are you looking for a unit to dive, and looking for a big company to trust for long term product support? If so what kind of diving do you want to do? Or looking to buy units for some agency or company with specific procurement rules? If so, again, what kind of diving do you want to do? Or...

Post pic of inside of tank

Rather than continue to rehash the deep air debate - at what depth does CCR become safer than OC Trimix?

Both

Some wings need them, some don't. I use one with my Dive Rite EXP. My Apeks WTX-D30 doesn't require one, it has little tank stabilizers built in. This keeps the tank closer and feels more stable than the EXP with STA.

Wow that song

Showa Atlas 620s are great.

- It's possible (but unlikely) that there was low O2 or even some CO in the mix. - It's possible that he wasn't equalizing properly and experienced some alternobaric vertigo which can cause severe nausea, I've seen this first hand more than once. It could happen in a pool. - It's possible he...

That's a new one to me, that sounds like it should be an old groaner. Nice.

Great video. Well narrated. Smart guy, but I would have GTFO the loop a bit earlier. I MIGHT keep diving with a slow dil leak, but not a unit that I can feel filling with water. Around 27:05 he mentions that caustic cocktails aren't a concern with modern sofnolime. I've never heard that. Does...

Eventually, after enough dive shops told them to pound sand, PADI handed over records on all divers certified under that agency.

Yes you can hose clamp them or make a DIY version of the hose clamp based mounts. But for MANY reasons it's better to sling it on your side. There are several long threads discussing where to carry a pony.

The research on "sawtooth" dives is limited, and any physiological implications are poorly understood compared to regular profiles. Computers and tables don't account for it well. However, lots of people do them and aren't dropping dead so it's not like you're going to get bent messing around in...