Dont get me wrong, I wouldnt touch a Korg workstation with a 50 foot pole nowadays. Once I got the Virus, I literally laughed out loud at how bad the synths sounded on the korgs. But the tube did do some nice stuff for the organs and ep patches, which is where those workstations excel.
Re keybed, i actually had the 73 key version - i really dont like weighted keys on anything but a piano. Luckily enough we now have a Rhodes mk1 in the studio

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