Good evening. I've recently purchased a new Casio CTK7200 and I would like to know how to solve a small difficultie I'm finding with the drawbar organs: How does the percussion work? I mean if it does only apply when I'm hitting one key and no other key is pressed or what? Also, is there a way to make that hammering trebbles always on no matter how many keys are pressed? Best regards. PS. Any suggestion about good patches for playing The Doors (Vox Continental sounds) would be also welcomed.