I'm asking this question on behalf of someone else, but does Casio use the same unweighted actions in all of their WK keyboards? The question originated on the Piano World forums, and an answer will be appreciated there or here, doesn't matter to me. I will keep track of both forums. Here is the thread on Piano World: http://www.pianoworld.com/forum/ubbthreads.php/topics/2237524/Best_keyboard_for_learning_Pia.html#2237269 With thanks in advance.