I was watching Jimmy Kimmel on Aug. 14th, which closed with a band called "Self," from Tennessee. Typical 2 guitars, bass & drums, & a keyboard player on a riser, facing sideways toward the drummer. I saw him playing some small synth keyboard on a stand that was mostly hidden in the 1st shot I noticed of him, til they showed him from the front of the stage. That white "stand" was an M-400 in all it's glory, & I heard both flutes & strings floating subtly, but nicely from it at different times.
Hardly K.C. or Yes, but it's SO great to see a Mellotron in live performance. They still rock & RULE! Cheers!