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Boolean subtraction of inner "cavity", treat it a a separate body; shrink it then subtract it from the expanded case "outer" solid model to create a...

Great report Faye :y: I have been there twice, staying at the Dreams and the adults only bit of Catalonia Royal la Romana. Dived with Pro Dive...

No, definitely not! Nice for a bit of Winter Sun and a break though. You could also stay in the town rather than the big All Incs, this was just the...

Nice report :) Bayahibe is a place I have looked at, as it's quicker/easier to get to than SE Asia. I appreciate it wouldn't have the same amount of...

Great fun when you do a pump case and you need to make the cores (lump of sand that forms the innards) to a different contraction (shrinkage...

Mainly Tesco and ASDA trolleys when we did the annual river clearance here in Bedford.

Intelligence is rarely genetically determined, unless there's severe inbreeding

Those TDI prices are American prices. If you shop around internationally, then you will see the same course being offered for peanuts. It is not...

Maybe but still unlikely, the TDI course is $1600 or (if you previous post is correct) two months salary. That is some serious outlay to go 5m...

Guernsey??? Waitrose surely?

Such a person can have the money to do an TDI Advanced Nitrox and Deco course and dive to 150; on air.

The famous wreck of the SS Sainburys Trolley

Is it worth the hassle? Is there anything special down there?

In the past, they have investigated all sorts of gasses. Neon is one that springs to mind. However, that costs even more than helium. Comex did...

https://www.bbc.co.uk/news/articles/c3g24l5md37o

That could be regarded as a spin off of having the right hand side of the bell curve not having kids, or fewer, than the left hand side.

It has -does it not - to be a personal choice? My choice also is not to add to the numbers. I have friends that have kids and family that are still...

I am reliably informed that you need it or the second stage will be upside down. Sorry - my understanding doesn't go any further. I have a long...

Hydrogen/helium. Why does the name Hindenburg spring to mind?

Simon Mitchell did a really good presentation a few weeks ago on his dives with hydrogen but a lot of that was to deal with HPNS at extreme depth as...

There is an expectation with the Royals in the succession line to produce at least two - an heir and spare. Three is just being cautious. I have...

I am not a techie diver so this may seem a stupid question. As I understand it, helium is used to dilute the other gases as it is non reactive. As...

What’s a left hand octopus, and why would I need one?

Sadly no matter how many times this bullshit is put forward it is wrong. I agree with you about the talking shop and Johnson is a poor example in an...

Lets be honest - this hot air being spouted at COP whatever at the moment will nothing but create a few more platitudes. The only thing that will...

I must've misinterpreted this: Would they? The agencies might (no idea, I've never had any interest in GUE and UTD are a bunch of cranks...

Shrinkage is allowance made at the pattern stage; it is material dependant and can be any where between ~2-5% or even more (I`ve made lead moulds at...

Dave's old website was an inspiration for a lot of people. I don't think I'd have had any interest in Mk15's without Dave's site and Kevin J's....