Thanks! No the Naja atra and Naja siamensis have never spit at my place. Only the Naja mossambica spit sometime. But they never spit outside the enclosure. Just sometimes spit at the glass when they got scared.
Once again Stefan, amazing snakes! You have a beautiful collection...I love exotic elapids and vipers! The Naja mossambica reminds me a lot of our Holocephalus bitorquatus especially in head pattern. Have you got any pictures of your enclosure setups that you could share? They always look so natural and it looks great.