This indeed is a most interesting comparison Guan. And yes Mr Morrison looks fine to me. And the old guy's, Milles Davis par example even lived a very hazardes live, performing in smoky bars and clubs, whisky and late hours and all ways on the move. He got to an respectable age, considering his live style.
To be honest I do feel the opposite! The Gapanbulu has me in a firm grip, so the last few days I played (practising) a lot. Some times one hour ad a row. And this resulted in a much more open air flow. I even can speedup cause everything is relaxed, feels smooth and open. Ad this stage all is in balance. I don't get to esoteric with you guy's but I dare to say I feel Mmmmmmmm. All is oke........... just the feel after a good workout without the sweat. Very refreshing.............So this is my fix for the day.
If I'm not mistaken I recall that Djalu him self, some where stated that you need lots of wind to make the Yidaki sing? One needs to work to get that air flow going. You need pressure to get the mouthing in perfect motion, even if you play Djalu style. And if you observe Winiwini closely you can see that this is a full body instrument. It's all about controlling the air flow. Maybe when we play with that kind of strength it could be damaging..........but on the other hand when playing that strong I reckon you have reached a level that you're totally in control.
The only thing I can relate to whilst playing ad peak performance, is that I can observe pressure in the head and lots of tension in the neck region. This automatically results in quitting when exceeding the speed limed. Plain and simple out of rocked fuel. But he I'm not in my 20 any more...........
Gaun I was thinking the same thing on Datjirri nose bleeds. It's also know that this appears a with bodybuilders who literary pumping up there self's till they pop

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Stay tuned, I got some more issues lined up to discuss.
Cheers to you all,