Alan, I have not opened the Solist simply because it works perfect but I may open it just to see if there is a date like the Professional 36 shown on my previous post and and see if there are any major difference between the Solist and Pro 36. I know the tone on the Solist is a little different it is also a lot louder than the Professional 36, this may be why the tone is a little different. I will take some pictures and post.
Melodica-Me