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That may well be your personal experience - but bear in mind that individuals' sensitivity to CO2 varies quite a lot. The scientific paper above - which AFAIK is the only rigorous data on pre-breathes and their ability to pick up scrubber problems - suggests that some people are more capable...

Genuinely asking - is there reporting that shows that the diver neglected to pre-breathe?

Exactly - and I would say that the 75% detection rate (15/20 subjects noticing a completely absent scrubber) is an absolute BEST case for this kind of failure. Two additional things I would highlight from that study: The 'partially failed' canister (sealing o-ring between the canister and the...

@DiveGearExpress a related question: when I bought a DGX single-tank package a few years ago (late 2021? 2022?) the wing I got was branded as Made in the USA by Oxycheq. Do you have any insight on when/why you switched suppliers for the wing?

That’s a good question actually. I bought mine from DiveInn, which is European but ships to the US very easily. There are a number of stores listed as dealers for Nanight in the US, so it might be worth contacting one closer to you and asking if they can get it. Or, you can order from GiDive...

If you’re after a small light that has the same kind of flood/spot light as the Sola S/F models, I highly recommend the Nanight X1. It’s tiny, uses a very commonly available battery (21700) that you can hot-swap or externally charge, and has a good tight spot beam and a very even flood beam...

Yes, it is.

I will say, I haven't been the most gentle on my Mk2i, but I think you'd find it very difficult to break. It's a titanium shell with a sapphire crystal screen, both materials that are extremely tough. The bezel of my watch shows some wear (where the anodizing has worn off), but the screen is...

Oh yeah, I meant side-by-side 21700s, the extra length of two in series is completely impractical.

I agree with the others that the RGB lighting is really not going to be a draw for most people. The two things I’d really love to see for some differentiation: - A light with a battery size somewhere between the 1x 21700 or 4x 18650 sizes that are common. A light with 2x 21700 would be a...

I've owned the Mk2i for a few years and put a couple hundred dives on it around Vancouver Island (so same conditions as you). I've also borrowed a Teric. They're both great dive computers, and I've used the Mk2i as my primary computer for many tech dives. With the 'big numbers' mode in...

Is there a jump functionality with the new Quantum?

FWIW, I use ‘cone spanners’, very thin wrenches that are common for bicycle service, which I already had lying around. It should be $10 or so for a high quality Park Tools wrench, and I can vouch for their high torque reliability. Only issue is that they’re not chrome, so you might have to line...

Yeah, I share your frustration. I think with Fourth Element, part of the problem is that their manufacturing is done by Ursuit (I believe? And my suit does say Made in Finland on the pocket tag), so Fourth Element may not have total control or visibility into the manufacturing.

If they’re not responding to your emails, there is a phone number for the North America office that’s easy to find. I had a similar experience when ordering mine years ago (which I thought was just a COVID thing), and I ended up having to call the North America distributor to get a response.

Hi, I would love to test the new light. I am very familiar with the SD06 and other similar budget lights, and I have even been running my own series of tests burn-testing different budget 21700 lights.

Oh, I 100% agree. I think that’s the justification for using the splitter.

10/70 is expensive?

If you don't have easy access to a spring luggage scale, a good alternative is simply to measure the volume of the light using a measuring jug. Put 1000 mL or 2000 mL of water in a large measuring jug. Then, put the light into the jug (ensuring there is enough water to entirely cover the light)...

I heard (third-hand) that Graham had them made to spec.