76 ain't JUST for piano, Ian... It allows you room for TWO splits, it allows for a bigger chord recognition area (if you are using ON BASS chords to shape a bassline), it allows for a low E for LH bass (without the temptation to grovel on low C ), it allows for a decent sized LH area for B3 sounds without taking your UPR end smear room away from you, and it's good for Wurli's and other electric piano sounds that had lighter actions than a grand piano...

Don't confuse size with capability. It's not JUST about the piano...