I had many years of formal training, both with Royal Conservatory and Yamaha Music, so am a confirmed "thumb under" kind of player.
It will be interesting to how (or perhaps, why) some will feel one is better than the other.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.