You can see how the piano top sunk a bit because I didn't let it dry. Did the whole thing today. Took me a few hours. I don't have the patience to wait a whole day for things to dry. (Or for that matter the time or place to let things dry). So it got about half an hour and then I slapped it on top. You can see the five supports I put inside. I didn't have anything like rice krispies or cotton candy or anything to stuff it with and I didn't want to use all fondant. Next time I'll try using cross beams or something.