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If you factor in the cost of initial setup and then regular maintenance on a compressor and/or booster, it might make more sense to just pay a dive shop to fill your tanks for the amount of diving you will be doing.

Did this tread ever figure it out exactly?

When I was a new diver, I had similar problems. I soon found that it was my own fault. I would not fully exhale, thus not allowing a complete exchange of lung volume. It would take a little bit, but the CO2 buildup would soon show up every time. New location, deeper dive, new buddies, new...

I have a small spray bottle filled with 50% baby shampoo and 50% water. I spray the inside of the suit, hood, gloves etc. that are too tight to go on easily. Works great every time I remember to use it.

Surgical tubing also has more stretch than bungee. You can set a length for wet suit and it will still work great with a drysuit. No need for adjustment at all. It stays put better too.

My doctor (who happens to be a diver) and the doctors at DAN both told me that 6 months would be the end of any further improvement. Dan actually told me 3 months but there had been some data showing it longer show they told me 6 to cover theirs butts. This is only in reference to spinal nerve...

I took a hit and was paralyed from the waist down. 6 chamber rides in 4 days. Improveds began after the 2nd ride, could wiggle a toe. Steady improvement well after being released until about 3 months. I still do not have perfect balance but can walk and run just fine. Still have that "pins...

It is indeed much cheaper if you do it yourself. Years ago, I bought the o-rings in bulk and made up kits for all my buddies.

I have actually cut 2 "pie" shapes out of each side of a neoprene neck seal and glued it back together to make the seal smaller. Worked perfect for several years. I used McNett Seal Cement only on the ends to glue it back together.

We already talked via DM. I have not heard any further from you.

Pretty sure mine comes with an adjustable mask mount

I will look and see if I still have my drawings for the ones that I had made for Add Helium. I will post it here if I still have it.

I have a pair of PST HP Steel 80cf tanks for sale. Never used since new hydro a year ago. Currently in North Central Florida but can get them to Pompano Beach. Din valves and asking $300 for both of them.

I have hundreds of hours on several different rebreathers, including homemade, and still have to work at not venting out my nose during some dives. It is not a unit related issue at all, just a natural way of breathing that we have to relearn during rebreather dives.

I have found that in a true out of gas emergency, the diver would suck a fart from a donkeys butt to get a breath, so dealing with a less than perfect mouthpiece is not a lethal issue.

It would have to be an improvement. There is not other direction for jm stuff to go but up.

When I was doing deeper dives with long bottom times we would graduate the helium % in the BO tanks to help mitigate the counter diffusion risk. This one time at band camp when things went sideways and our 5 hour dive turned into a 10 hour dive, I did do a complete diluent swap and flush to...

I would definitely try without a swivel first.

SeaCure is the only one that works for me and I have tried all of them.

Early in my RB diving, I had a similar issue. When ascending and venting out my nose it would cause a slight gag reflex. I found that if I vented around my moth it did not happen. Turns out I was just venting to much volume at once rather than smaller amounts more frequently. I found that...