Derek Sherinian is confirmed to use the KORG 01R/W sound module in his keyboard rig, as detailed in the gear list featured in the article "Happy Hour(s) at Derek Sherinian's Leopard Lounge" on Music Gear Review.

"I used KORG Trinity Plus mainly. Also KORG 01R/W sound module and GEM S2 as well. "

You can see the unit under the laptop to Roger's right

After speaking to his sound engineer for live shows, I can confirm he uses the Korg 01/W for the Wurlitzer sound on tour. He has used this unit since the 90's. The preset is Combination B21 ''The Tramp'' He has used it on tour since the Solo tramp days and on Rites of Passage and Classics Live.

In this picture of Kondo's sound studio from 2006, the 01R/W sits in the right space in the middle of the rack.

"I already have a number of synth modules, many of which I use mainly for specific sounds. The Kurzweil K2500R has got great sounds and is a good all‑round workhorse, while the Korg 01R gets used for more ethereal parts. I've also got a Wavestation SR that has a few interesting textural sounds in it, and to be honest, I've actually named tracks after its patch names! My Emu Morpheus is usually left set to its Vibes patch.

The tenth photo shows his studio and is captioned: "Marius de Vries now does most of his programming work in his own room at London's Strongroom studios. The large rack at left contains, from top, Alesis DM Pro drum module, Korg O1R/W sound module, Roland MKS80 Super Jupiter synth with MPG80 programmer, Studio Electronics MIDIMoog synth, two Akai S3200 samplers, Emu Vintage Keys and Morpheus sound modules, Kurzweil K2000R sound module, Roland MKS50 and JV1080 sound modules."

At 1 minute into the YouTube video titled "Brad Buxer discusses Michael Jackson's 'Who Is It,'" you can clearly see Brad Buxer's KORG 01R/W in the rack case, positioned underneath his Roland MKS-20 rack. This video is provided by arXter on YouTube and features Buxer discussing his involvement in Michael Jackson's song "Who Is It" from the Dangerous album.

"I've got an 8100 Power Mac that was basically outdated the second I bought it. I use Performer, and I have four 760 Roland samplers. I have a Korg TR rack sound module, a Korg O1RW sound module, a Korg X3R, an old Proteus FX and a Roland JD-1080. I've got a Roland R-8M. My keyboard is a Roland D-70. I have an old Ensoniq ASR-10 sampler. I have a Tascam DA-88 and a Mackie 32*8 mixing console, plus a couple of Lexicon reverb units."

"I do almost all of my music work out of my studio at home. Ok, here goes: I use a pair of Adats, a Soundcraft Ghost for mixing, a bunch of outboard Symetrix and Lexicon processors for dynamics and effects, and an Eventide Ultraharmonizer DSP4000 for pre/post processing and vocal effects. For keyboards I use a mix of older and newer stuff. I have an old Prophet 5, a Casio FZ-1, a Roland MKS-50 with a programmer and an Oberheim Matrix 6. For newer gear, the Roland JP-8000, MC303, and the Novation BassStation are nice for creating new sounds quickly. I also have a little Korg 01/wR with a software programmer that can be coaxed into making some fat sounds (no analog filter tho). I'm pretty religious about not using presets, so I really favor the more programmable synths.

A lot of the recording and arrangement happens inside a PC; I run Logic Audio 2.5 for digital recording, post-processing and midi arrangement. I use an Audiomedia III card for digital transfers to and from a Tascam DA-30 dat. For guitar I use my trusty Les Paul through a Marshall half-stack, with an Oberheim Echoplex on the fx loop. "

"Our music productions for film and television, cinema, games, web, soundtracks and many other areas of application are created in a modern sound studio in a completely virtual environment on the computer (with various soft samplers and plugins on a purely digital basis for the best sound quality - or else with the help of the latest hardware technology, mixing consoles, synthesizers, effect devices and digital signal processors for further sound refinement for the highest quality demands without compromise.

You can find some impressions of the studio on this page."

In a photo of the Stratovarius "Dreamspace" album text, it is evident that Antti Ikonen uses the KORG 01R/W. Additionally, in an old interview, Antti mentions using the Korg T2 and Korg M1.

On his website, we can see that he mentions his studio equipments