I’ve played this model, and while it’s graded, I wouldn’t say it’s on the heavier side. It’s a fairly decent graded action too. If it had a mod wheel Yamaha would have sold a large number just from consumers buying it to use as a midi controller.

Sqk
_________________________
GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.