I have looked but can not find a wired or wireless smoke detector that can text me or send some kind of message to me in case of fire. I saw one SMS smoke detector but I am trying to avoid using cell or Lan lines. I have animals and would not want something to happen. I understand that if the fire is bad enough that wifi will go out as well, but I can use my neighbors wifi signal.
And in the 1960s, in the time and day of the Cold War, the US and Soviet Union would have had what particular reason to care about the potential hazards of space travel? Unlike, say, applications of fission technology, sending e rocket up with four crew only risks four lives, not hundreds of thousands. What would really interest me is how the remarkable twits that are hoax and conspiracy theorists would care to explain how sattelites survive in orbit. That's the pieces of electronic hardware that shouldn't be able to survive excessive amounts of radiation, either, but seem to be doing an admirable job of allowing nutcases around the world to use satellite TV to spread their wild, inconsistent theories.
The flexi stainless connections are good but the internal dia. of the pipe is quite small and may restrict the flow if you are using them as the main fill and outlet of the cylinder Generally compression fittings are good but use paste and dont overtighten ( or you will get wet!)
Compression fittings, in my opinion, are not problematic at all. If installed and tightened correctly, they will provide a leak free joint for many years. A great alternative to solder,flux, and a torch.
As far as I know it's just that the cost is a lot more than standard fittings.
