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It is true, please let me educate you. Here is an old post from Patrick, the owner of Oxycheq: I bolded the relevant part of his post. The urethane coating is what makes the shell of a Mach V stiff unlike other wings. That makes it harder to pack than more flexible wings such as a Halcyon or...

This is not entirely true. Usually the US brands use standard components, but not always. For example, Halcyon has changed the threads and I think OMS did so also. The European brands. Apeks, Mares, and the OP's DTD use proprietary fittings. For the bladders sometimes you can mix...

In my opinion, (and I am in the minority) is that Oxycheq wings are less than ideal for travel. The reason is the shell is coated and not flexible which makes it more difficult to pack than a more flexible wing such as a Halcyon or DGX. If you live year-round in a tropical location than this is...

I would be wary of the SPG, I had one like that where the face popped off when I opened the tank valve. Mine was in a boot and the boot caught the face so it didn't fly away. It gave me a shock though when I heard the pop.

First, welcome to Scuba Board. Second, all open circuit scuba regulators should deliver gas at ambient pressure or very close to it. In theory a "balanced" first stage should maintain a constant IP regardless of than pressure, in practice there is a shift in tank pressure, but not as much as...

Landon, I am interested in knowing where you are getting the financial information for Aqualung/Apeks. It is notoriously difficult to find financial information on private firms, because they are not publicly-traded. So they don't need to release financial information. I think the Aqualung...

Why would you want to pay extra for an environmental seal and a 5th port when so many regulators come with this standard? Also how stable is this company? If it goes belly-up then where will you get parts? For the cost of these regs. I think a person would be better off with ScubaPro or Apeks.

People have been throwing shade on Taiwan/Chinese regulators since HOG first hit the market around a decade or so ago. Except for a few anecdotes, I don't see divers having wide scale problems with Taiwan/Chinese regulators. People have anecdotes about Halcyon and Apeks failing also. As far as...

Why are unbalanced second stages unsuitable as deco regs?

Dude, this thread is 12 years old.

Webbing is available in different stiffness, maybe softer webbing would be more comfortable. Also webbing does relax a bit over time. Another consideration is was the harness adjusted properly? Most of the videos, like the one posted, show the adjustment done on land in street clothes. While...

When I learned to dive, back in the dark ages, the pool rig was an Air 1 with a normal hose and an Air 2 as the inflator. We were taught to donate the primary while grabbing the buddy's BC strap for the ascent. The buddy was also supposed to grab the donor's BC strap for the ascent. The funny...

I think the decline in diving is due to the cost of equipment and the focus of the industry on destination diving. When the average Joe/Joan walks into a dive shop and sees $1200 BCs, $2,000 regulators, and $300 fins s/he will have sticker shock. When they see trips to far-off locations in the...

For the sake of argument lets analyze this: At 10 hours a 747 would travel 5,500 miles, assuming a cruising speed of 550 mph. 33,000 gallons / 5,500 miles = 6 gal/mi 6 gal /mi / 300 passengers = 0.02 gallons per passenger mile (seems pretty efficient to me) For comparison a commuter with a...

Thank you for your in-depth explanation. I have the Subgear variant of this regulator. I think it was called the SG-30 or something like that.

What was the difference between the C300 and the C350? I remember there was some sort of problem with the C300 which was supposedly fixed in the C350.

I think part of the difficulty is that these OEMs make similar products to each other (or copy the same products), so it is hard to figure out who made what.

Randy also sells regulators for non-extreme diving.

I know who you are talking about and I agree.

Yes, Piranha does in the US. https://www.piranhadivemfg.com/item/Piranha-Explorer-WMD-Extreme-Diving-2nd-Stage-All-Black--14515 You could try alibaba or aliexpress.