1. I have two very old steel I think 63’s, great for beach dives!
2. I have a Kiddy 14cuft pony, 2015psi and still passes test. A few times tank monkies haven’t read the stamp and have filled it to 3000+ psi! It has a nice ring at that pressure! I bleed it back down before doing a hydro while wearing it :)
3. I’d always heard that if the lining flaked that could end up in the first stage (unlikely) or rust could form behind the lining and would not be seen during a VIP.
4. A LDS tried to tell me they had to do Eddi-Current testing on ALL aluminum tanks even if they had current VIP and hydros from other shops. I’m guessing this was to pay for the tester! I stopped going there for fills, there was word on a local NJ dive board that they were not keeping up on compressor servicing and pumping water. They closed shortly after that.