Alan, Thanks for the photos. Quick tip. the best way to play the Bass melodica is to fill the chamber a second before you need to play a note. example.. counting 1, 2, 3, 4, on count 1 you blow air in and hold until the end of 4 on beat 2, 3, 4, press a key down and off on 4.5 and air back in on beat 1. Practice this until you can shorten the gaps and build up your lungs, this one takes a lot of air so don’t try to hold them to long they will either go out of tune or when you play your next note it will not have enough air to sound. obviously the faster the tune the longer you can make you air last the slower the tune your air will run out faster.