I've been trying to put this in my mind why some members claim they need more than 61 keys. I've watched many 76 and 88 key players perform, and most perform well within the range of 61 keys. I never seen a piano player play the extreme lower or upper ends of the keybed. In most instances, when playing a 61 key keyboard as a piano the left had begins at C-2 and pretty much stays in that range, while the right hand rarely strays much above C-4's octave, and when it does, it's only few a few scant notes.
I'm really interested in hearing why there's a need for 76 or 88 keys, and the songs that make the need for them so necessary.
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)