It's fun to answer, that's why.Why would you restart this 2.5 year old thread? The OP hasn't even visited the forum since he posted on June 17, 2020.
This isn't a rhetorical question. I'm genuinely curious why people do this. I understand if they have the same question and want clarification of something already answered, but not for something like this.
Another reason is that threads never die: The OP is not the only person interested in these answers. We are creating a treasure trove of information related to diving here. Reading these replies has given me much pleasure - and I don't look at the date stamps.