"Lots has been said about this build. I congratulate Lego on an astonishing set. Struggling though with the keyboard. As an advanced builder you need to adjust the axles and moving parts to get a smooth flow on the mechanics. one thing i can't solve as of yet and i hope to get feedback on this. As you know the keys start moving playing a song. Motor turning one direction. To reset you need to rewind the axle till it hits a stopping point. It is here where the axle just overturns and 4 of the keys (blue) do not align perfectly . Maybe lego engineers will recognize this and come up with a patch. Thx"