Marc77

The piano is built using 4x 407026 (the black 1x1's in step 9). These have an edge which stands in the way when placing the piano against the wall (under the arch). Instead find 1x1's without this edge - in light grey that would be 4558953. I found some red and black ones in my miscellaneous - the colour doesn't really matter as they are covered by the purple exterior parts. Now it fits perfectly. Marc