Grand Piano when placed on wall should become an Upright Piano

Most crate furniture has very useful separate wall furniture (toilets as urinals, deer pelts as deer heads) but currently the grand piano can only serve as a grand piano. O.R has also been sorely lacking a compact upright piano the closest one being the pale oak piano/organ recently revealed in sneak peeks. I believe both problems could be solved by just making the wall furniture for Grand Piano be a small upright piano