Quena (or Andean) flute

I copied a bamboo quena flute measures, had to make some adjustments to get it in tune.
The flute is tuned in G (A=440).
The flute is 38 cm long. My printer can only print 19 cm so I had to split the flute.
Just print, glue together and play.
How to play?
Look at https://www.youtube.com/watch?v=PltKPr6v-Ws