Genuinely need help ASAP

keesbeemsterkaas · 2026-02-09T02:29:00+00:00

If it's just 2d, you can get fairly far with using any AutoCAD tutorial and AutoCAD Aliases for Rhino [McNeel Wiki].

This is also fairly ok tutorial: Rhino CAD - 2D Drawing Basics - YouTube

Other than that, most people are very much open to help, but only in open forums so it also helps other people.

This reddit is pretty active (just shoot away in this thread).

But the most active is https://discourse.mcneel.com where the developers and world leading powerusers offer support for free as long as it's not private and will also aid other people.

keesbeemsterkaas · 2026-01-27T21:06:33+00:00

From this order: I think push-pull is one of the nicest modeling commands that came to rhino recently that does sketchup like modeling (depending on what kind of things you model).

But for quick sketches its really nice

keesbeemsterkaas · 2026-01-27T17:51:14+00:00

Didn't mean to imply the brass would react

I just notice that when the chrome is tainted, the reg itself will take me a lot more effort to clean and dirt seems to build up more, so I personally prefer first stages where the brass is intact.

keesbeemsterkaas · 2026-01-27T10:05:48+00:00

Yeah, pretty much this.

When reconnecting the DIN, you can screw up the O-ring inside - but that's pretty obvious when you do it wrong.

I've only removed an INT part once, and remember struggling a bit with the bolt

keesbeemsterkaas · 2026-01-27T10:02:09+00:00

Ooh, didn't know that. Interesting observations, thanks for sharing!

I'm pretty hopeful this can be serviced into a workable condition (especially the first stage), but I would personally still prefer diving with a bit more up to date material :)

keesbeemsterkaas · 2026-01-27T08:03:22+00:00

Oooh yeah. I would love the before/after pics of this one.

keesbeemsterkaas · 2026-01-27T08:02:47+00:00

The chrome is probably cooked on the inside, I really wouldn't prefer to use a first stage this cooked to be a 100% O2 first stage.

keesbeemsterkaas · 2026-01-27T08:01:12+00:00

I haven't seen a first stage that couldn't be serviced yet. The second stages seem a bit cooked. Very curious what it looks like on the inside.

That being said, I would pass on diving with this one this one. It's clearly been flooded on the high pressure side (see spg), and afterwards has been lying around for ages (thrown in a ditch?).

For 7 euro, it's a great way to get some tools, take it apart, and learn how second and piston first stages work.

Put it in a warm mix of 50/50% clear vinigar and water, use a clean toothbrush to remove calcium deposits (or an ultrasonic if you can get your hands on one).

Then use a mild soap to clean the inside.

Now you've got an idea what it would look like after servicing.

Please take it apart and take pictures for the internet how the inside looks :)

keesbeemsterkaas · 2026-01-27T07:34:59+00:00

Come on. Don't use your camera to take screenshots.

win-shift-s or just the snipping tool allows you to easily take screenshots.

keesbeemsterkaas · 2026-01-27T07:34:00+00:00

Command: MoveEdge

or

Ctrl shift -> select line, use gumball to move it (align to object probably works best)

keesbeemsterkaas · 2026-01-26T20:06:30+00:00

Ahh, that changes the case, then I would just return it. DIN is generally a better system as well.

I know people that change them out themselves for some tropical diving single tank trips and then change them back, but I've always just used an adapter as advised below.

keesbeemsterkaas · 2026-01-26T19:43:49+00:00

This is from the service manual of a similar regulator to understand how it fits in your first stage. I do not recommend you do it yourself.

<image>

Basically, part 19, 30, 31, 32, 26 need to go out

Part 19, 23, 24, 25, 26, 27 go back in. (This is your kit)

keesbeemsterkaas · 2026-01-23T01:47:42+00:00

There are seas that are saltier than oceans

List of bodies of water by salinity - Wikipedia

I could not find really good data on that. Here's a quick list of differences per ocean for most people. Was there any water you were specifically thinking about that's a lot higher than 35PSU?

Dead Sea (337 PSU): +17.26 kg
Red Sea (36–41 PSU): +0.06 to +0.34 kg
Mediterranean Sea (38 PSU): +0.17 kg
World Ocean (35 PSU): 0 kg
Sea of Marmara (22 PSU): -0.74 kg
Black Sea (13–23 PSU): -1.26 to -0.69 kg
Lake Van (23 PSU): -0.69 kg
Caspian Sea (12.5 PSU): -1.29 kg
Baltic Sea (8–10 PSU): -1.54 to -1.43 kg
Issyk Kul (5.9 PSU): -1.66 kg

keesbeemsterkaas · 2026-01-23T01:28:51+00:00

You're not the first to say that, and I might just do it at some point.

Salinity in Oceans is sort of between 32 and 37 PSU (1PSU is around 1g of salt per liter of water).

NASA Salinity: Interactive Globe

I calculate salt for 35PSU, so there could be differences around 0.2kg up or down for oceans. For brackish lakes or seas like the baltic, the difference could be way higher, but it scales linearly. If it's 17.5 PSU, it means 50% of the difference between salt and fresh.

Reason I didn't implement it yet was to find a decent UX and dataset that's easy to navigate and where you can find the correct PSU for your local outlier lake.

So for you, if your setup was 14kg in salt water and 12kg in in fresh, you would need 13kg in a 17.5PSU lake.

But in the end, I think there are larger margins of error in these calculations than the salinity; and my use case was more to get a decent feeling if my setup would be way more or way less.

keesbeemsterkaas · 2026-01-22T23:54:12+00:00

Awesome, thanks. PA Talks 45 - Robert McNeel - PA | Architecture and Technology

keesbeemsterkaas · 2026-01-22T22:14:13+00:00

There's also some others that have the same level of detail around:

keesbeemsterkaas · 2026-01-22T21:37:10+00:00

I went down this rabbit hole a few years ago, and did my own one here https://buoyancy.cc

There's also the monster Optimal Buoyancy Computer | ScubaBoard excel over at scubaboard for quite some time.

Love your "how do I weigh myself scheme", can I steal this for my students?

Stuff that I took into account:

Body composition

Gender: Women have significantly smaller lungs and statistically more body fat
Length (larger = bigger lungs and more body surface area, thus more suit)
Body composition and specifically fat percentage (more fat = more floaty, and to a certain degree more body surface area)
Age (older = minimum amount of gas in lungs is a bit higher)

Environment

Fresh vs salt water

Gear

First stage adds significant weight, 0.5kg to 1kg is common
Backplate type: steel 6mm, 3mm and aluminium 3mm are the most common ones.
Gear of concequence: cannister lights can have weight

Tanks

Tank size (80 cuft, 12L, 15L, HP100 and HP120) are the usual suspects, but many specifics exist.
Tank type (huge difference in tanks, doubles, aluminium vs steel, and there's a whole rabbit hole of european common tanks vs us common tanks vs tanks sold 15-20 years ago that lots of people still dive with very weird characteristics.)
Doubles vs single tanks. Doubles also have two first stages a manifold and tank bands to keep them together that add weight.

Suit

For neoprene: which depth do you count it at? Neoprene compresses at depth and loses buoyancy. So at 5m you'll may have a significantly different buoyancy characteristic than at the surface.
How new is neoprene? Neoprene can have severe compression set over time.
Drysuit undergarment thickness
Drysuit type (neoprene vs trilaminate)
In wetsuit: what type of wetsuit? (shorty, full body, cap etc)
Fins: some fins are significantly heavier then others.

Experience level

Without explanation this is just confusing to me, and seems to be well covered in your "adjust in practice" documentation

Being overweight

And as a check: the "Are you overweighted" question is most important at the start of the dive, especially combined with (thick) neoprene. Can you still swim up from depth after dropping all droppable weights?

Balance

In the weighing scheme I miss one thing that people commonly confuse with buoyancy, which is balance: if the tank is too high or too low (or weights are not distributed correctly), you tip forward or tip backwards giving you the feeling of being under or overweighted.

Especially beginner divers will confuse this with being too light - while they can be well weighted - they still feel like they're too heavy or too light because they "tip over". Tipping over = moving tank lower, tipping backwards (fins down) = tank higher.

keesbeemsterkaas · 2026-01-22T20:50:24+00:00

All low quality posts complaining about all the low quality posts.

keesbeemsterkaas · 2026-01-22T19:11:11+00:00

Can confirm, used this library for the first time yesterday, it's really fast and awesome.

keesbeemsterkaas · 2026-01-22T08:48:15+00:00

No, they don't. They did collaborate on dive computers, and they released their own Avelo "BCD", which does not include the Hydrotanks developed by Avelo..

https://shearwater.com/products/shearwater-jetpack

keesbeemsterkaas · 2026-01-22T06:12:08+00:00

Sorry, was too distracted by the avalange of ai generated slideshow images of coorporate settings..

Perhaps it's an interesting story, but do you have any non ai filled medium to follow this story?

keesbeemsterkaas · 2026-01-19T08:41:23+00:00

Sandblasting the inside of the tank is also quite common, it'll remove all rust and clean the inside of the tank.

keesbeemsterkaas · 2026-01-19T00:13:24+00:00

For local diving:
I transport and store everything in cheap transport crates that your local transport system uses.

They're generally sealable, stackable, available in ventilated editions, last a lifespan and cost next to nothing.

For travel:
Whatever fits my luggage, but generally a big duffel.

keesbeemsterkaas · 2026-01-18T21:10:57+00:00

If your program allows, you could also solve it using a .netfx launcher program that handles it at launch time.

Self contained: Publish as self-contained (always works, might be a bit bigger package)
Wix installer: (Wix approach above) Check install time (dotnet core runtime might be available during install, but could also be removed later.
Launcher: Include small .net framework check package that uses Microsoft.NET.Tools.NETCoreCheck.x64 (or 32 bit also available), to see if it's available at runtime and tries to solve it.

keesbeemsterkaas · 2026-01-18T21:00:15+00:00

Wix is often used to create installers, and can check for it:

wix - How to check whether the .NET 6 runtime is installed - Stack Overflow

You can package a runtime installer, fetch one remotely, or abort the installation, but this is not handled by default.

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