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The PST MP72s are 3AA3000+10% cylinders with original hydros in 1979.

Well I have a friend with two PST MP72s who I'm helping out. I'm taking offers right now. PM me These are basically HP75 cylinders. Very good bouyancy characteristics for jacket style BCD as you will need no extra weight. In salt water these will be like wearing 10 lbs of lead using an AL80...

That probably was a stupid post. I would much rather just use LP85s that are filled to 3100 psi. Much easier to get and better bouyancy characteristics. I'm not going to bore you with a long discussion of autistic psychology. Put shortly, I said what I said because to me, it is completly logical...

If you want to hear a extensive discussion, say jet fuel can't melt steel on an internet forum. Oops.

Good arguement... I might consider the sacrilege of using a tank boot for donning from standing. I still think they should be removed atleast for storage so that you can prevent corrosion. Ofcourse, I could just have my buddy/team member hold them up while I don them. I am usually the first...

You should get another piece of neoprene and use Aquaseal. The point is to melt the neoprene to fuse it together. Same proceedure that I would use to repair my wing. I have been fortunate to only have punctured a glove (with a drop point knife, lol) which I have not been able to repair. That's...

No, it's a simple balancing act. The arguement is that you shouldn't leave your gear standing up unattended. When you are donning, they are attended and thus can be stood up. That would be funny though.

I really like how you put "voodoo gas" on your cylinders. However, I don't like the boots. The reason being is because DIR teaches (DIR is like a cult, really) that you don't need boots as you should either be wearing the rig or you should have them layed down. Plus that an extra $20 you can put...

Filled to the same 13% overpressure (3750 PSI), MP72s hold 80 cubic feet. With their thicker walls, I bet it will be easier to convince the fill technition to give me a 4500 PSI fill where they hold 98 cubic feet of gas. I'll be negative as all hell, but a redundant bouyancy device should...

I am looking for a new home for some of my "old" scuba gear. I have : Sherwood Avid CQR3 BC in good condition Oceanic Zeo in good condition Alpha9 octopus in good condition Suunto transmitter in excellent condition Genesis Aquaflex fins in excellent condition Oceanic Viper fins in eh condition...

Wish I could have done this... Would have saved me money so I can buy more scuba gear.

Up for offers is a set of Oceanic regs. They have been used for 2 seasons and are in good condition. I am not sure how to post a picture to the forum so just PM me so I can give you my email. I also have a Suunto transmitter in excellent condition with a fresh battery that I am looking to sell...

I figured that. I also thought about LP66s but I they're like unicorns. Plus they're a little too small.

I would have to say that taking up diving gave my life new meaning. It's now my favorite activity.

They are similar in volume. 85s have a higher tank factor (volume/psi) so that they can hold the same volume at a lower pressure. At 3100 psi, 85s hold the same volume that 100s hold at 3442 psi. Their diameters are about the same (85s are 7" while 100s are 7.25") and their lengths are a little...

I was thinking I would have to add a trim float, actually. lol. They're only like 3 lbs heavier than a LP72, they're around 10 lbs heavier than al 80s underwater.

Yea, but the center of gravity would be about 2.5" higher than, say, the LP85s I've been looking at. This is what I mean by DIR diving being more about following rules rather than experience. What I'm looking for is if that is enough to make ou head heavy. I've been considering getting LP85s as...

I have a friend who is willing to sell me some PST MP72s cheap and I was wondering if they would make me head heavy when doubled. Feel free to post pictures of your short doubles. I've not been able to find pictures of short doubles online. Here's some information on these cylinders... Diameter...

Almost all regulators are the "downstream" type, so when they fail, they fail open. The regulator's IP rises and then the regulators free flow. Unless you're using a poseidon, you won't have this problem.

I can't see at all when I have my mask off. My eyes automatically shut because of anxiety. At that point I establish negative bouyancy and switch to my backup mask. I have to establish negative bouyancy or else I float like a cork because of increased breathing rate.