Originally Posted by 918pdk
That’s a very good explanation, but I’ve started this thread 2 years ago if I’m not wrong. After many unsuccessful attempts with a vacuum device, I’ve improvised a swim cap and created hanger/extender from it.Maybe I will try your method out of curiosity, but my improvised hanger/extender is perfect since I can do 2 hours long sessions.
I did a 16 hours extender session today.
I will try 16 tomorrow.