Hello @ViroMajor If you do a search in the box, upper right hand corner, for PPH. You can find some info.
https://sanctioned-suicide.net/threads/upload-of-exits-july-2019-live-stream.29291/
https://sanctioned-suicide.net/threads/pph-dec-2019.30370/
https://sanctioned-suicide.net/thre...the-pph-january-2020-debreather-update.30042/
There are more, that is just a couple I am following. If you are interested in the debreather..
https://sanctioned-suicide.net/threads/the-diy-debreather-is-coming.31114/
There are more, that will get you started.