Did you? Did you open (one of the) boxes?
Kawai: owww she is a lady, perhaps a bit older lady since she isn't top notch? Though she sounds ok to me. Owww in the middle part a tune I know from when I was really young of age. A piece played by Richard Richard Clayderman, my mom loved so much and therefore I heard more than occasionally.
It's quite interesting that you do sound checks, but it makes a lot of sense. Been with my friend(s) to their sound checks many times as well. But then in clubs. Last tuning of the sound setup, the speakers, the whatnot. But never they had a key to try and find some mysterious story, experience or whatnot.
I wish you a LOT of fun and pleasure tomorrow. Am sure you going to handle miss Kawai gently. When some of the guests aren't pleased with what you do, do a Santa Claus act with them ... https://ecency.com/music/@klye/the-night-santa-went-crazy-weird-al-yankovic