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The "mechanical rotary head switch" that Orcatorch is referring to is a simple tighten to turn on, unscrew to turn off mechanism that is the same as backup torches from decades past. The D511 even will operate with 3 C-cells like proper backups should. Video from OrcaTorch:

tl;dr at bottom Hopefully there is someone who can map this out for in a bit more detail. As I understand the manual, the G2 Tek will only "lock you out for 24 hours 'cause it's a dumb computer" if you are at the surface for more than 3 minutes after having missed a mandatory deco stop, after...

Thanks! I missed that. This will certainly take it off the list for many. Because I'm curious, do the Shearwaters just keep running the calculations after missing a stop? Are they valid? I hope it's obvious I'm not a tech diver. I just enjoy knowing things. Thanks

I was referring to the Perdix 2 having a depth rating of 260 meters, but having a depth sensor that only works properly to 130 meters. The Scubapro has a depth rating of 120 meters, but the depth sensor also works at that depth. In my comparison I said the Perdix goes significantly deeper, but...

I guess I missed that the depth sensor is calibrated down to 130 meters, so having a depth "rating" of twice that seems odd to advertise.

I haven't used either (I use a regular G2), but it looks like they are pretty comparable. The G2 Tek can pair with 8 transmitters instead of 4 for the Perdix 2, but the Perdix has a user-replaceable battery and is rated for significantly deeper. I mean, obviously Shearwater is one of the...

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I could use the low-profile socket, if that's in that bunch. What other tools do you have?

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Both ScubaPro and Aqualung should have international parts availability as good as it gets (may not be all that good though). That said, I've found getting my regulator serviced at a dive destination to be more miss than hit. I end up just bringing a spare first and second stage on big trips...

While a bent d-ring is the standard, with it being held in place by a clipped-on backup light that's bungied to the shoulder webbing, I find it more convenient to have one of the stamped "bent" d-rings from Piranha on this page: Harness Accessories Piranha Dive Shop | Almost too many choices...

I'm sorry to see new members receive such a negative reaction to a pretty harmless idea. People have skinny-dipped in the ocean for millennia with very few appendages being bitten or swum up. It's not a "stupid" activity just because it isn't something you're interested in. As far as advice...

OTF's comment was about computers where the alarms are customizable, like being able to set a gas reserve vs always alarming at some not-super-useful number.

The first two are a bit old for me, plus they don't have the compass that you'll need. I don't know if they can be set for nitrox. The third is not an air-integrated computer - it is a regular computer in a console with an compass and SPG. It has two buttons, which I like better than the...

I do the opposite (G2 on the right wrist and transmitter on the left) and it never drops a connection for me. I find it a bit more reliable than the Galileo Sol that I had previously, but that only dropped out intermittently.

If I were selling that on Ebay I would be very happy with $150.

It sounds like you've made up your mind, but just to keep the conversation going, a couple of points could be made. 1. Many people would enjoy driving the M3 over the Corolla even if it's only 5000 miles per year. 2. I expect my regulators to last my lifetime, and possibly another lifetime...

Remember that a regulator set (for most people) includes 2 second stages. I think your backup should be as high-performing as your primary, so that increases the cost a bit. The Deep6 Signature series that Tbone recommends are the highest value new regulators out there (high-end performance at...

FWIW, from a reliability perspective, MSA firefighter SCBA gear uses lithium-ion batteries. The battery sits between the air cylinder and the firefighter's body to keep it away from the heat. On a different note, Orcatorch makes some lights that have a twist-on "switch" if that's what you...

I'm still using the cut off end of an HP hose. I guess I'm too cheap to get a real tool. For a few services a year it is working fine.