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The crossing can be rough.

Outside of their center balanced design, the d420 and the TFX have another thing in common: a lack of commitment from their manufacturers. Why did ScubaPro kill further development and not correct the flaws in the d420? Why, after the big buildup is Atomic allowing the TFX to fall on its face...

Used Force Fins show up regularly on ebay, sometimes at very good prices.

Please read the rules for classified ads: https://scubaboard.com/community/threads/special-rules-tos-for-the-classified-section-current.652240/

I have reached many checkouts in online shopping and turned back after seeing the shipping charge. Randy at Piranha Dive Mfg will quote pretty high shipping costs on his web page and then return anything above his actual cost. Pretty remarkable and commendable for an online retailer.

The ebay guy is a retired technician. He probably knows what he's talking about. Send him a message and ask.

The old metal ScubaPro's should work just fine as long as they're not damaged. They worked 30 years ago and nothing's really changed. Again, the variables are: IP, orifice condition and position, seat condition and position, and spring + balance chamber counterpressure. Did you try it out before...

Dressed up? Do balloon hats count?

Personally, I would start out by setting the Conshelf to 130-135 and screw the second stage orifice in a touch. If that doesn't work I'd go shopping for a new orifice or spring. You might need a new lever, but as long as you have some flop in your lever with the diaphragm removed that isn't your...

I am an older diver, and have never had any indication of systemic DCS, but regularly fall victim to "skin bends". I suspect I have PFO. I do not get skin bends when diving nitrox with an "air" profile. Please don't tell me I'm going to die. At 76 that's becoming generally apparent.

Single edge razor blade?

I've had two Oceanic computers fail in that they apply an incorrect altitude adjustment offset. You can compare the dive planning screens on the computer with the printed data in the back of the manual to check.

Perdix.

I think it would take some effort to flood a Perdix. Its seal has nothing to do with how much you crank down on the battery compartment. "many years of experience" sometimes translates to carelessness.

"Technical Dive Guide Certification" Is there such a thing? With what agency?

I have my latest 100 or so dives on my Perdix in case someone needs to see them. I try not to quantify my life.

Not when its on the tank. If you want a light tank just ask for a short fill.

My diving Roatan, Cozumel, and Indonesia everyone seems to default to yoke. DIN seems to be no big problem, but a Yoke to DIN converter will most likely be a pain in the neck (or back of the head).

I have an 11T but I don't dive it because the port layout doesn't suit me. If Scubapro offered a Mk2T I could put all my Conshelfs to bed. I would think a 2T would be the easiest to design and machine. A structural analysis might come up with a first stage that is both smaller, and lighter. As...

Whatever: Just be ready when it’s time to go. Don’t keep others bobbing in the water waiting on you.